@kclaussen99 As MJM mentioned it sure does. Reversed polarity will cause failure of the capacitor, just as using a lower voltage value replacement will. If the original is 1000uF (micro farad) at 16VDC you should replace with a 1000uF of at least 16VDC but 25VDC may actually be better although the size may be bigger and not fit.
@dannymusick are you fucking stupid ? i dont think he gets a monitor for free every 10 minutes ... wtf were you counting how much would he make an hour for ? ... dumb shit
@onthecuttingedge2005 This was recorded with my flip camera which was horrible at focusing close up. All my newer videos are done on a much better camera. If I run into another one of these monitors I will do another video with my new camera.
hi there.great video...I have a strange problem. I have a viewsonic va1916w.When I turn it on it does work normally for 3 maybe 5 minutes and after the screen goes off but the indicating light stays on. I turn off and then on again the monitor with the power on button and then it turns on again and after that it does the same thing. I replaced a damaged capacitor but it didn;t solve the problem. Could you give me any idea of how to solve this. Thank you in advance.
@mjmcomputers hey, I have some asus and hp monitors, but all the caps are good. I know that one transformer shorted, but I have no idea whats wrong with the others. Usual white/black screen problem or they won't turn on. What other parts commonly short or die to cause this? MOSFETs maybe?
@TheLazahYoda Yep, earlier I had cleaned a throttle body and a week earlier I smashed my thumb nail with a mini sledge hammer and lost part of my thumb nail.
You basically stole the Acer. It would have been good of you to of given it back when you got the working one back. Better still give it as a gift and don't ask for the $10 in return.
@Thomaxonal lol are you a fag? its not stealing.. the if he wouldnt take the monitor from them then the monitor would rott in their keller or even worse become garbidge!!!
He asked to get it they gave it to him and then he put effort and knowledge to make it work again!! its rightful his!!!
Note I ohmed the resistor, and it was in the 5% tolerance, but it is a power risistor so that may be the problem, I'm going to try replacing it with new, but that resistor also comes off of T102 but I'm hoping it is not shorted.
@fentonpf Sounds like ther is another failed component causing the resistor to short. One common failed component is the backlight inverter transformer. See if the board is discolored near it from a short or heat.
I have a question for you, I have the same monitor, for a while it would make this intermitten buzz, but would keep working, once the display quit working, I noticed that when I turned it on, the screen would backlight but show now display, I/O light stayed on solid. I opened up the unit and found scorching on the R125 20M risistor beside T102, it got so hot that it burnt the trace, I soldered some new trace and the monitor came on, but immediatle started to smoke, on the same resistor, any help
Ok, this comment may be old, but still: caps in power supplies are filtering caps where more capacity is better. Higher capacity means lower ripple current, which in turn makes the caps last longer. The ones they use in production are the trade off between cost, size and reliability. So you can indeed use higher capacity caps. Just be sure to get low ESR types (and maybe high temperature rating) for switching power supplies.
My DELL LCD's green light is flashing and the screen flashes at the same time. I've opened it up but all the capacitors look fine (none of them have a popped top or anything) any idea on other things that could be wrong with it?
@mimomomi It's hard to say if there are no visual signs of anything being burnt, you will have to do in depth testing. Best thing to do is search the web for problems with your model monitor, maybe you can find someone who has found the exact problem.
Diagnosis, replace every blown capacitors, which is literally just nickel and dimes worth.
Had the Acer AL1723 which surprisingly (not) is identical as your 17" Dell monitor, just replace all the blown capacitors with cheaply available ones and voila instant freebie (almost).
OK here my issue. I have a L1919S LG TFT. Suddenly, it won't power on. If I pull plug out for long enough and pop it back in, 29 in 30 times the green light will flash on and off, but 1 in 30 times, the monitor succeeds in turning on and stays on.
I got three of those exact same model, that were used 24/7, after they died after 2 years of use. Production date was July 2007, died at the end of 2009. I opened them up replaced the caps in the power supply (be sure to get high-temperature, low-ESR types if you do it). I'm using two of them since then as my main monitors (unfortunately they are only anlog in, so I don't know know how long). The third is damaged in the RGB-in circuit, but I'm still keeping it for spares.
Thank you sooo much, My work just trashed 4 of these monitors and your video helped me get the first one fired up and working. I'm assuming the other 3 will be the same repair. This must be an issue with these dell monitors.
I only had 25 volt capacitors (I know you said you could go up in voltage) but I hope that's not too much. Thanks again for your help.
hey! my pc monitor (actually it is not flatscreen) when i open it up it doesnt work and the green small light at the the right side down near the switch button just blinking fast but the monitor was not come on.. to open it up i just ill make it warm by using hair blower maybe i nid 10-15mins to open it up.. is like when its warm it easy to open but when is cold my pc monitor is hard to open... please reply.. hustle_barrex@yahoo.com
Dude, I kept having to fast forwarding this video because there were some parts where I about fell asleep. Your voice is so dry and you don't show any excitement. I am not trying to be be mean, just some helpful criticism. Thanks for the video though.
thank you for your videos. The problem is i have replaced the capacitors in the power supply of a Samsung monitor (Power Board IP-35135B). I even replaced the ones that looked fine in case they couldn't hold up charge anymore. Still no success. Back light still doesn't lightup. I know for a fact its the power supply problem because i have tried it with a different known working one and the monitor lights up.
Do you have any solution? Could it be other problems such as transistors or coils?
I got a 19" for free. Apparently looked like the LCD display was out as it had black burns on it. Ordered a new screen but still it's not working. Maybe the power supply is out, but ALL capacitors look perfectly fine.
How can I check that the problem doesn't lie in power supply board or the other smaller board next to it (as shown in your video)?
@mjmcomputers: Nope, no sign of life. I am thinking to try the new screen on another monitor. But that will only tell me if the screen is working or not.
@mjmcomputers It sounds like the something in the power supply isn't working. Check to see if there are any input fuses that could be blown. Look for signs of anything burnt. It also could be a problem in the power button circuit. If you can find any model numbers on the boards that may help.
The power supply is overheating look on the power supply small parts that have discoloration or have to mach heat producing chips and ask some one to re-solder it.
@JuniperSprouts Thanks, yea sometimes I mark the board with a marker if the board is not already marked. Sometimes under the cap they mark the board with a circle with half of it colored white and normally that is the negative side (stripe side).
@hasan2222 Going up on the voltage of the capacitor is okay. Normally these small capacitors don't hold enough voltage to harm you. They normally self discharge from the load of the components.
good site with infos about the bad caps and lots of helpful threads on a ton of LCDs is badcaps net ... their forum is full of solutions for fixing LCD monitors (not only with capacitor probs)..
by the way.. Dell LCDs (most of the 15", 17" and 19" ones) are actually rebadged BenQ POS monitors.
and another BTW: replacing low-esr caps in a switchmode powersupply (like in LCDs) with general purpose ratshack crap isn't gonna last long and may destroy even more..
@Knaeckebrotsaege I'm registered over at badcaps dot net. I didn't know that about the dell monitors. They actually seem to hold up fairly well as they are the majority of what I see in service. The caps I used are just as good or better than what was originally in the monitor.
@Knaeckebrotsaege I've written posts before, then went to post and I'm 200 characters over, have to delete half my post. Maybe they should make an option for a long reply and a quick reply.
@ItsKnucklez Its genuine XP Pro. Windows includes most codes, but divx seems to be an exception. On all my PCs I end up adding klite codec pack, even windows 7.
@ItsKnucklez This is my video, the first codec pack that I had installed on my mac to edit videos put that watermark on my videos. I found another that didn't put the watermark on it but never went back and re edited the other videos. If you look at all my videos, it's the first couple videos that have DIVX on them.
hey, i have a Aopen 17" lcd monitor and its model is F2715 but when i start up the monitor it only stays on for around 2-3 minutes. is it also a battery problem?
@rbeoulve It really depends on what it's on. Sometimes you can get away with using a different uf cap cause it's close enough. But, that's not real close. I would try to find the 2700uf.
@anonymous1237 honestly I don't really use it, it works great just don't have a use for it at the moment. I keep it around as a spare, but probably should replace the 15" that I currently have on my server and use this 17"
Hi I have a monitor LG W2234S that does a defect that is not from the signal and the blue LED flashes and remains always blue first remained orange when there was no graphics card connected. Can be the fuse?
graphic card connected or not connected the blue led blinks and if i want turn off the monitor it does not turn off. When it was good if there wasn't signal output the led was orange while now is blinking blue
@dommyreg24 I looked up that model online and it seems to be a common problem, as of October 2009 LG was replacing the monitors for free. Contact LG and see if they will replace it.
I have the exact same monitor. replaced the same two capacitors, before it wouldn't power on at all. now it comes on but for only a second or two. if you turn it off it will come right back on but only for a second or two. any ideas would be helpful.
@quackers9999 Check your solder joints and the polarity of the capacitors, look for any other bad capacitors, the 2 you replaced were same value and are new right?
In addition to mgmcomputers' suggestion to make sure the caps replaced are correct, you may also have to replace others in the power supply circuit, especially if they're the same cheap Chinese caps.
do you discharge any of these caps? Like even just working around the good ones to remove the bad ones could give you a good zap. Or are you just really careful?
I really want to try replacing caps myself, but I have no idea how to safely discharge them.
I've heard waiting a few days unplugged will do it, but I've also heard they can hold a charge for years
@sbab83 These little capacitors don't hold enough charge to shock you. The big ones like start capacitors for motors and microwaves are the ones that can shock you.
If the capacitor doesn't look burned out or leaking, how can you tell if it's no good and do you use, read and understand those testers looking thing that has the black and red wires on it.
@jeanol1 I don't have any tools to test them in circuit, if you remove them you can text them with a multimeter set to the ohm position. I replied to another comment on this video with the detailed steps on testing capacitors.
unfortunately it doesnt have any stick with the model name.... but its about a 20 inch year 2005. 20 v 4.5 a ... it also has usb inputs on the side... sorry thats the best i can describe it. There is a clear tint of blue and pink in the display. thanks so much for trying to help me.
my lcd monitor has similar problem. When i turn on the monitor, it turn off by itself and when i turn it back on again it turn off by itself. It works but it just won't stay on. I want to ask, do i need to replace the power supply circuit?
I fixed about 10 tft monitors this month with bulged caps, also a common problem is the micro fuse on the inverter pops for no reason, look on the inverter for a white small component marked F1 and bypass it.
thank you so much bro!!! a 19 inch dell monitor was given to me today and after watching your video, i ran to radio shack , got 2 capacitors, as the same 2 were blown on mine, replaced them , and now i finally have my dual monitor setup!!!! thanks a million.!!!!!
great video but how did you know that the capcitors were bad because i think i have to same problem. i wont turn on at all. could you help me out thanks.
Great video man, im gunna try to fix my tv soon because i saw smoke, now i believe its a capacitor! thx.. one thing PLEASE HELP. if my monitor didnt just "go out" but go hit lightly and has dead pixels, replacing capacitors probly wont do anything.. right??
on my pcb, it doesn't show which is positive or negative. Since this is my first project, I want to be very careful. I know which is which on the capacitor, but wanna know if I am installing right. In the circle where I removed the bad capacitors is a black side of the circle, and a yellow side(the color of the pcb side). Which side is + or -? And should I go + to + - to -?
i have one of these but i dont have the power adapter, can someone plzz tell me where to buy it ? i live in london by the way, and i only have the vga cable so i cnt turn it on =/
I have the same kind of display, it powers on, works okay, but after some time the backlight starts to flicker, I guess it's the same capacitor acting up.
Is there some kind of disassembly guide for this display?
@sterby1 Sounds more like the backlights or backlight inverter. It wouldn't hurt to open it up and look for bad capacitors. I have another video on dis-assembly on this monitor.
Cracked it open and guess what? Same problem, I bought two caps at Radio shack.
They were giant size but I squeezed them in. Also they're not hi temp 105c they're 85c, will that make a difference? I'm using the monitor now to write this comment.
Thanks, without this video I'd never been able to fix it.
The high temp will work, but not last as long. I would order the high temp ones and just have them handy. That power supply gets pretty hot and will eventually cause the lower temp capacitors fail.
Normally you can tell visually, the top should be flat, not bulged. There should not be anything leaking out the top. Sometimes they are bad and you can't tell visually, you have to remove them and check them with a ohm meter.
this is quoted from another site but how I test them. 1) Discharge the capacitor by shortening its leads.
2) put your multimeter in the high ranges 10K-1M
3)CONNECT MULTIMETER TO CAPACITOR LEADS(OBSERVE THE POLARITY IF ELECTROLYTIC). AT SOON AS THE LEADS MAKE CONTACT, THE METER WILL SWING NEAR ZERO. IT WILL THEN MOVE SLOWLY TOWARD INFINITY.
4) IF THE CAPACITOR IS BAD, IT WILL GO TO ZERO OHMS AND REMAIN THERE.
Thanks for the professional tip, can I ask if the monitor dosent power up how can I test the power supply with a multi meter? just assume nothing is wrong with the Capacitor
If it won't power on, no lights or anything then your probably not getting voltage out of the power supply. If you can isolate which wires are the output you can check them with a volt meter. Check the power inlet and make sure you have power coming in. There is most likely something wrong with the power supply look for anything burnt or discolored, or dark areas on the circuit board from heat. Also check the fuses. What is the model number?
I just bought a Dell 1706fp from an electronics recycler and he gave me a 1704 that wasn't working. Well the next day the 1706 stopped working too. Same thing- won't power on. I got the 1704 totally disassembled so I guess I may try and buy some capacitors to try and fix them. I never soldered a capacitor before so let me learn how to detect a leaky capacitor first. If I wasn't so broke I would just trash them and buy a new one. But people need to avoid buying the Dell monitors.
Actually besides this series of monitors the dells seem to hold up very well, I've seen failures on most other brands too. I have an NEC and a HP that I need to repair. Just look for capacitors that have a bulged top, normal ones are flat.
Well I went to RadioShack trying to find a couple of 1000uf 10v since two of them were buldging but RadioShack doesn't carry anything close. And a local tv repair shop was closed. Then I saw a guy selling both circuit boards for one of the Dell models online and he mentioned in the ad that if the video works intermittenly then it could be due to the video board. So the power board in the 1706 looked fine so I used that board with the video board in the 1704 and I have video now. :) Thanks
I was just given an 17" LCD monitor that, when turned on, just flickers the desktop for like a second and then goes blank. It also looks like the monitor keeps trying to come back on but can't. Any common know problems for monitors behaving like this?
Its most likely the backlight inverter, sometimes they can be repaired, like bad capacitors, but sometimes they just need to be replaced. It could also be the backlights.
Thank you for this information! Thanks to your video I was able to repair and bring back to life a Dell 17" LCD monitor that was given to me, the one I repaired had the exact same leaky capacitor that yours had. :-) Thanks again!
I just repaired one this week, before I saw your video. What kind of soldering setup do you have? I used a $15 Weller soldering iron and 67/33 tin/lead solder from Radio Shack that I'd bought many years ago, and both the desoldering the old caps and soldering the new ones was a bitch.
the normal caps are like 30 cents a piece, these are high temp 105 degrees which are more expensive. The place I buy them "electronic parts outlet" is much cheaper than radio shack and fry's, but more expensive than mouser. But shipping costs always makes mouser more expensive.
Yeah i was gonna say mouser is where its at. You can get the high temp caps for 30 cents a piece but unless you're ordering lots of stuff it's not worth it cause of the shipping
Radioshack has the 470uf 35v which will work. You can use higher voltage ones without a problem. In fact they might last longer. Just remember to install the new ones the same way the old ones come out. Most have a positive lead and and negative lead. The - - - - on the cap means the negative side lead and the other side has no markings which is the positive side lead.
When replacing these keep the uf the same if possible and for voltage keep it the same or go higher.
Thanks for the video. I got one of these for free because it would not turn on. I cracked it open and found the three leaky capacitors right off the bat. I ordered new caps on ebay (Radio Shack did'nt have this size) and made the repair with my son. Your vid was a great reference to have, Thanks!
The layout is very, very similar to a samsung I opened up. I wonder if Dell actually makes their own monitors or just outsources it to other manufacturers.
You Rock !! I followed your directions and sure enough, the 1000 Micro Farad caps were bad. I was able to find replacement caps at Frys (16 volts) for $3 each. Desoldering is always tricky. But once I got the old caps out, it was downhill from there! Again, my thanks!!
my comp has 2 dvi input thingys but i have vga monitor :( lol
MrextremeUntouchable 5 days ago
wish mine had dvi in
shinyfuzzy 1 month ago
@shinyfuzzy Yea, I have another one here with just vga.
mjmcomputers 1 month ago
@mjmcomputers my inverter is for the backlight is dead so im home making my own backl light lol
shinyfuzzy 1 month ago
@shinyfuzzy if it doesn't work out, sometimes you can find the inverter boards on ebay pretty cheap.
mjmcomputers 1 month ago
@shinyfuzzy Whatever works, lol
mjmcomputers 1 month ago
@mjmcomputers im using it right now. its against a window using the sun as a backlight lol. when its dark i have a light to put behind it
shinyfuzzy 1 month ago
@shinyfuzzy Thats a "green" solution to the problem.
mjmcomputers 1 month ago
wish u luck
MyBlessup 1 month ago
noobs....
XTYNoLuck 2 months ago
awsome dude :):):)..........if sum thing goes wrong in our monitors or pc first v hav to check our capacitors :O:O:O
903govind 4 months ago
smash it like @poopoogarret
boyuchuadaniel 5 months ago
hey does polarity matter for these caps?
kclaussen99 5 months ago
@kclaussen99 I believe it does. The capacitors usually have - or + marks on their sides, just make sure you put them back the same way.
r3ll1 5 months ago
@kclaussen99 yes, it does matter, the side with the stripe on the capacitor is the - side.
mjmcomputers 5 months ago
@kclaussen99 As MJM mentioned it sure does. Reversed polarity will cause failure of the capacitor, just as using a lower voltage value replacement will. If the original is 1000uF (micro farad) at 16VDC you should replace with a 1000uF of at least 16VDC but 25VDC may actually be better although the size may be bigger and not fit.
rhblakeman 4 months ago
THANKS! I had the exact problem, swapped out the capacitors for some ones from a faulty router, and now have a working monitor! Net cost: $0.00
crazy1be 6 months ago
0:50 AC voltage kills capacitors, there might well be a faulty diode connected to the capacitors
myplaceoryours 6 months ago
you need to speak louder- thanks for the videos
shazam75 6 months ago
I also got one for free, but my back lights are broken :( lucky me
oman2310 6 months ago
Thank you very much for your information, love this stuff.
MrMooseful 6 months ago
Great video helped very much! I had two 19" monitors and all they had was the same problem! AWESOME FIX!
CrAZzY688 7 months ago
sweet now you can sell it for 75$ and make a $71.70 profit! @ apx 10 min. to fix, your making $430 an hour! good job.
dannymusick 8 months ago
@dannymusick are you fucking stupid ? i dont think he gets a monitor for free every 10 minutes ... wtf were you counting how much would he make an hour for ? ... dumb shit
blahLTblah 7 months ago
@blahLTblah lol ok :p
dannymusick 7 months ago
Focus!
onthecuttingedge2005 8 months ago
@onthecuttingedge2005 This was recorded with my flip camera which was horrible at focusing close up. All my newer videos are done on a much better camera. If I run into another one of these monitors I will do another video with my new camera.
mjmcomputers 8 months ago
hi there.great video...I have a strange problem. I have a viewsonic va1916w.When I turn it on it does work normally for 3 maybe 5 minutes and after the screen goes off but the indicating light stays on. I turn off and then on again the monitor with the power on button and then it turns on again and after that it does the same thing. I replaced a damaged capacitor but it didn;t solve the problem. Could you give me any idea of how to solve this. Thank you in advance.
132aris 9 months ago
good video thanks..
pmdsp 10 months ago
Nice Work!..Good to see you got the Caps properly without accidently reversing polarity:)
oldtilter 10 months ago
HOW NAME CIRCUIT INTEGRATED I801 ? POWER SUPPLY EXPLODED..
THNK...
pvaly07 10 months ago
help ,need schematic diagram dell 1704fpt chassis ptb1511
pvaly07 10 months ago
@pvaly07 Sorry I don't have one, search around on google.
mjmcomputers 10 months ago
This has been flagged as spam show
@mjmcomputers how name integrated I801 .....in the power supply circuit ?
dell 1704fpt chassis ptb1511
pvaly07 10 months ago
@mjmcomputers hey, I have some asus and hp monitors, but all the caps are good. I know that one transformer shorted, but I have no idea whats wrong with the others. Usual white/black screen problem or they won't turn on. What other parts commonly short or die to cause this? MOSFETs maybe?
DeusMalleus 8 months ago
Nice Amplifier!
TuneMaestro 11 months ago
@TuneMaestro thanks, I found it at a thrift store.
mjmcomputers 10 months ago
nice nails
TheLazahYoda 11 months ago
@TheLazahYoda Yep, earlier I had cleaned a throttle body and a week earlier I smashed my thumb nail with a mini sledge hammer and lost part of my thumb nail.
mjmcomputers 11 months ago
You basically stole the Acer. It would have been good of you to of given it back when you got the working one back. Better still give it as a gift and don't ask for the $10 in return.
Thomaxonal 11 months ago
@Thomaxonal I asked if they wanted it back, they did not. When they gave it to me they had already replaced it and vowed never to by acer again.
mjmcomputers 11 months ago
@Thomaxonal lol are you a fag? its not stealing.. the if he wouldnt take the monitor from them then the monitor would rott in their keller or even worse become garbidge!!!
He asked to get it they gave it to him and then he put effort and knowledge to make it work again!! its rightful his!!!
Emeengor 11 months ago
yes you can but it will be brite
stvensonnathanael 1 year ago
Note I ohmed the resistor, and it was in the 5% tolerance, but it is a power risistor so that may be the problem, I'm going to try replacing it with new, but that resistor also comes off of T102 but I'm hoping it is not shorted.
fentonpf 1 year ago
@fentonpf Sounds like ther is another failed component causing the resistor to short. One common failed component is the backlight inverter transformer. See if the board is discolored near it from a short or heat.
mjmcomputers 1 year ago
I have a question for you, I have the same monitor, for a while it would make this intermitten buzz, but would keep working, once the display quit working, I noticed that when I turned it on, the screen would backlight but show now display, I/O light stayed on solid. I opened up the unit and found scorching on the R125 20M risistor beside T102, it got so hot that it burnt the trace, I soldered some new trace and the monitor came on, but immediatle started to smoke, on the same resistor, any help
fentonpf 1 year ago
My monitor's backlight wont stay on for more than 3 seconds. it makes a humming sound and all the caps seem fine .. any help on this ?
heroinfernox 1 year ago
Comment removed
heroinfernox 1 year ago
@rbeoulve
Ok, this comment may be old, but still: caps in power supplies are filtering caps where more capacity is better. Higher capacity means lower ripple current, which in turn makes the caps last longer. The ones they use in production are the trade off between cost, size and reliability. So you can indeed use higher capacity caps. Just be sure to get low ESR types (and maybe high temperature rating) for switching power supplies.
superdau 1 year ago
Hey,
My DELL LCD's green light is flashing and the screen flashes at the same time. I've opened it up but all the capacitors look fine (none of them have a popped top or anything) any idea on other things that could be wrong with it?
Thanks
mimomomi 1 year ago
@mimomomi It's hard to say if there are no visual signs of anything being burnt, you will have to do in depth testing. Best thing to do is search the web for problems with your model monitor, maybe you can find someone who has found the exact problem.
mjmcomputers 1 year ago
Looks like you are running OSX86 on the PC w/the Acer monitor!
Good job! Very useful!
TommyPlane14 1 year ago
Diagnosis, replace every blown capacitors, which is literally just nickel and dimes worth.
Had the Acer AL1723 which surprisingly (not) is identical as your 17" Dell monitor, just replace all the blown capacitors with cheaply available ones and voila instant freebie (almost).
amanamen 1 year ago
OK here my issue. I have a L1919S LG TFT. Suddenly, it won't power on. If I pull plug out for long enough and pop it back in, 29 in 30 times the green light will flash on and off, but 1 in 30 times, the monitor succeeds in turning on and stays on.
Weird.
DLPBurke 1 year ago
@DLPBurke Sounds like bad capacitors in the power supply.
mjmcomputers 1 year ago
@mjmcomputers yup... I will repair it soon. I just bought a new monitor for temporary use, an old CRY, cost me 2 quid (2 UK pounds)
DLPBurke 1 year ago
@DLPBurke CRT that is ahaha
DLPBurke 1 year ago
@DLPBurke
I got three of those exact same model, that were used 24/7, after they died after 2 years of use. Production date was July 2007, died at the end of 2009. I opened them up replaced the caps in the power supply (be sure to get high-temperature, low-ESR types if you do it). I'm using two of them since then as my main monitors (unfortunately they are only anlog in, so I don't know know how long). The third is damaged in the RGB-in circuit, but I'm still keeping it for spares.
superdau 1 year ago
hey buddy, i got a lcd caps look fine, but that yellow square thing on the board is making a humming sound............you got any tips ?
zombie4uu 1 year ago
@zombie4uu thats the transformer, it could be bad or another component could be causing it to behave that way, what is the monitor doing?
mjmcomputers 1 year ago
Thank you sooo much, My work just trashed 4 of these monitors and your video helped me get the first one fired up and working. I'm assuming the other 3 will be the same repair. This must be an issue with these dell monitors.
I only had 25 volt capacitors (I know you said you could go up in voltage) but I hope that's not too much. Thanks again for your help.
ampaholic 1 year ago
hey! my pc monitor (actually it is not flatscreen) when i open it up it doesnt work and the green small light at the the right side down near the switch button just blinking fast but the monitor was not come on.. to open it up i just ill make it warm by using hair blower maybe i nid 10-15mins to open it up.. is like when its warm it easy to open but when is cold my pc monitor is hard to open... please reply.. hustle_barrex@yahoo.com
B4RR3X 1 year ago
Ты бы руки для начала помыл, не стыдно? Кондеры у нас меняют школьники 3-го класса, проще наверно только батарейки в фонарике поменять))))
MrKZKZKZKZ 1 year ago
Dude, I kept having to fast forwarding this video because there were some parts where I about fell asleep. Your voice is so dry and you don't show any excitement. I am not trying to be be mean, just some helpful criticism. Thanks for the video though.
wwjoshdew 1 year ago
thank you for your videos. The problem is i have replaced the capacitors in the power supply of a Samsung monitor (Power Board IP-35135B). I even replaced the ones that looked fine in case they couldn't hold up charge anymore. Still no success. Back light still doesn't lightup. I know for a fact its the power supply problem because i have tried it with a different known working one and the monitor lights up.
Do you have any solution? Could it be other problems such as transistors or coils?
ASUSproz 1 year ago
I got a 19" for free. Apparently looked like the LCD display was out as it had black burns on it. Ordered a new screen but still it's not working. Maybe the power supply is out, but ALL capacitors look perfectly fine.
How can I check that the problem doesn't lie in power supply board or the other smaller board next to it (as shown in your video)?
Thanks.
mindspring283 1 year ago
@mindspring283 Does it light up or anything? If so what color is the power light?
mjmcomputers 1 year ago
@mjmcomputers: Nope, no sign of life. I am thinking to try the new screen on another monitor. But that will only tell me if the screen is working or not.
mindspring283 1 year ago
@mjmcomputers It sounds like the something in the power supply isn't working. Check to see if there are any input fuses that could be blown. Look for signs of anything burnt. It also could be a problem in the power button circuit. If you can find any model numbers on the boards that may help.
mjmcomputers 1 year ago
sir, jst wanna ask ..
wen i open my computer my pc turn ON,,, but suddenly Display Shutdown After Few Seconds To Few seconds...
wat am i suppose to do???
pls help
09278751957 1 year ago
@09278751957 is the computer still on? have you tried another display?
mjmcomputers 1 year ago
@mjmcomputers the computer is on.. but wen i tried to off d monitor then turn it on
the screen appeared but it will turn back into to Black...
09278751957 1 year ago
@09278751957
The power supply is overheating look on the power supply small parts that have discoloration or have to mach heat producing chips and ask some one to re-solder it.
soroka69 1 year ago
I have the HP vs19e with the same problem. replaced 3 of the caps and BINGO, it works!
captainmorganhook 1 year ago
Respond to this video...Good Work! I'm really disappointed in the quality of lcd monitors. The old crt monitors held up so much better.
mjmcomputers 1 year ago
Very good video.
I like your calm, confident voice.
This is good for my soldering confidence. How do you keep track of polarity on the caps? Marker?
JuniperSprouts 1 year ago
@JuniperSprouts Thanks, yea sometimes I mark the board with a marker if the board is not already marked. Sometimes under the cap they mark the board with a circle with half of it colored white and normally that is the negative side (stripe side).
mjmcomputers 1 year ago
Thanks for posting. Excellent tutorial for someone like me who knows little about computer troubleshooting and even less about repair.
marathon1974 1 year ago
capacitors must be replaced with the same specs, specially the chimical ones, otherwise they might explode.
AND before u try to work with the ones on the board, try to short circuit them or they might burn ur finger if u touch both poles
also watch for the polarity of chimical ones, ITS VERY IMPORTANT
hasan2222 1 year ago
@hasan2222 Going up on the voltage of the capacitor is okay. Normally these small capacitors don't hold enough voltage to harm you. They normally self discharge from the load of the components.
mjmcomputers 1 year ago
@mjmcomputers
They will still have a charge, I am talking about the giant rectifier capacitor, if u dont believe me, touch it
hasan2222 1 year ago
good site with infos about the bad caps and lots of helpful threads on a ton of LCDs is badcaps net ... their forum is full of solutions for fixing LCD monitors (not only with capacitor probs)..
by the way.. Dell LCDs (most of the 15", 17" and 19" ones) are actually rebadged BenQ POS monitors.
and another BTW: replacing low-esr caps in a switchmode powersupply (like in LCDs) with general purpose ratshack crap isn't gonna last long and may destroy even more..
Knaeckebrotsaege 1 year ago
@Knaeckebrotsaege I'm registered over at badcaps dot net. I didn't know that about the dell monitors. They actually seem to hold up fairly well as they are the majority of what I see in service. The caps I used are just as good or better than what was originally in the monitor.
mjmcomputers 1 year ago
@mjmcomputers that comment about the general purpose caps was in general ;)
the character limit for the comments is kinda annoying sometimes.. >.>
otherwise i would have mentioned that in my previous comment.
Knaeckebrotsaege 1 year ago
@Knaeckebrotsaege I've written posts before, then went to post and I'm 200 characters over, have to delete half my post. Maybe they should make an option for a long reply and a quick reply.
mjmcomputers 1 year ago
@ItsKnucklez Its genuine XP Pro. Windows includes most codes, but divx seems to be an exception. On all my PCs I end up adding klite codec pack, even windows 7.
mjmcomputers 1 year ago
@ItsKnucklez The camera I used to use encodes the videos in the divx format, So I did have to add the codec to my PC also.
mjmcomputers 1 year ago
@ItsKnucklez This is my video, the first codec pack that I had installed on my mac to edit videos put that watermark on my videos. I found another that didn't put the watermark on it but never went back and re edited the other videos. If you look at all my videos, it's the first couple videos that have DIVX on them.
mjmcomputers 1 year ago
hey, i have a Aopen 17" lcd monitor and its model is F2715 but when i start up the monitor it only stays on for around 2-3 minutes. is it also a battery problem?
jhiand 1 year ago
@jhiand Does it completely turn off or does the power light turn a different color?
mjmcomputers 1 year ago
@rbeoulve It really depends on what it's on. Sometimes you can get away with using a different uf cap cause it's close enough. But, that's not real close. I would try to find the 2700uf.
mjmcomputers 1 year ago
Are you happy with the monitor?
anonymous1237 1 year ago
@anonymous1237 honestly I don't really use it, it works great just don't have a use for it at the moment. I keep it around as a spare, but probably should replace the 15" that I currently have on my server and use this 17"
mjmcomputers 1 year ago
The problem non are capacitors
dommyreg24 1 year ago
Hi I have a monitor LG W2234S that does a defect that is not from the signal and the blue LED flashes and remains always blue first remained orange when there was no graphics card connected. Can be the fuse?
dommyreg24 1 year ago
@dommyreg24 Does it remain solid blue when the video card is hooked up, just nothing on the screen?
mjmcomputers 1 year ago
graphic card connected or not connected the blue led blinks and if i want turn off the monitor it does not turn off. When it was good if there wasn't signal output the led was orange while now is blinking blue
dommyreg24 1 year ago
@dommyreg24 I looked up that model online and it seems to be a common problem, as of October 2009 LG was replacing the monitors for free. Contact LG and see if they will replace it.
mjmcomputers 1 year ago
I have the exact same monitor. replaced the same two capacitors, before it wouldn't power on at all. now it comes on but for only a second or two. if you turn it off it will come right back on but only for a second or two. any ideas would be helpful.
quackers9999 1 year ago
@quackers9999 Check your solder joints and the polarity of the capacitors, look for any other bad capacitors, the 2 you replaced were same value and are new right?
mjmcomputers 1 year ago
@quackers9999
In addition to mgmcomputers' suggestion to make sure the caps replaced are correct, you may also have to replace others in the power supply circuit, especially if they're the same cheap Chinese caps.
Watcher3223 1 year ago
good job
markcumbriauk 1 year ago
do you discharge any of these caps? Like even just working around the good ones to remove the bad ones could give you a good zap. Or are you just really careful?
I really want to try replacing caps myself, but I have no idea how to safely discharge them.
I've heard waiting a few days unplugged will do it, but I've also heard they can hold a charge for years
sbab83 1 year ago
@sbab83 These little capacitors don't hold enough charge to shock you. The big ones like start capacitors for motors and microwaves are the ones that can shock you.
mjmcomputers 1 year ago
If the capacitor doesn't look burned out or leaking, how can you tell if it's no good and do you use, read and understand those testers looking thing that has the black and red wires on it.
jeanol1 1 year ago
@jeanol1 I don't have any tools to test them in circuit, if you remove them you can text them with a multimeter set to the ohm position. I replied to another comment on this video with the detailed steps on testing capacitors.
mjmcomputers 1 year ago
This has been flagged as spam show
how do i fix a monitor that is green and pink in thick lines?
tankbukkake 1 year ago
how do i fix a monitor that is green and pink in thick lines?
tankbukkake 1 year ago
@tankbukkake What brand and model monitor?
mjmcomputers 1 year ago
@mjmcomputers
unfortunately it doesnt have any stick with the model name.... but its about a 20 inch year 2005. 20 v 4.5 a ... it also has usb inputs on the side... sorry thats the best i can describe it. There is a clear tint of blue and pink in the display. thanks so much for trying to help me.
tankbukkake 1 year ago
how do i fix a monitor that is green and pink in thick lines?
tankbukkake 1 year ago
my lcd monitor has similar problem. When i turn on the monitor, it turn off by itself and when i turn it back on again it turn off by itself. It works but it just won't stay on. I want to ask, do i need to replace the power supply circuit?
thequietgrl 1 year ago
I fixed about 10 tft monitors this month with bulged caps, also a common problem is the micro fuse on the inverter pops for no reason, look on the inverter for a white small component marked F1 and bypass it.
sunnycheetah 1 year ago
Thank you for your video. I am able to fix my monitor for $2.
intrepid1950 1 year ago
thank you so much bro!!! a 19 inch dell monitor was given to me today and after watching your video, i ran to radio shack , got 2 capacitors, as the same 2 were blown on mine, replaced them , and now i finally have my dual monitor setup!!!! thanks a million.!!!!!
PROPHETICPRODUCTIONZ 1 year ago
great video but how did you know that the capcitors were bad because i think i have to same problem. i wont turn on at all. could you help me out thanks.
TheDallasboy23 1 year ago
Great video man, im gunna try to fix my tv soon because i saw smoke, now i believe its a capacitor! thx.. one thing PLEASE HELP. if my monitor didnt just "go out" but go hit lightly and has dead pixels, replacing capacitors probly wont do anything.. right??
remix696 2 years ago
No if there's dead pixels then the screen needs to be replaced, normally its not worth the money.
mjmcomputers 2 years ago
aight thx man.. i guess ima go search google!
remix696 2 years ago
LMAO! from 0:00 - 0:10 Messing with cpu does mess with your head sometimes LOL! i have the same problem.
knockout1981pro 2 years ago
This has been flagged as spam show
on my pcb, it doesn't show which is positive or negative. Since this is my first project, I want to be very careful. I know which is which on the capacitor, but wanna know if I am installing right. In the circle where I removed the bad capacitors is a black side of the circle, and a yellow side(the color of the pcb side). Which side is + or -? And should I go + to + - to -?
knockout1981pro 2 years ago
i have one of these but i dont have the power adapter, can someone plzz tell me where to buy it ? i live in london by the way, and i only have the vga cable so i cnt turn it on =/
yuriperiotto 2 years ago
This model, and most other dells just take a standard computer power cord. What does the plug look like on yours?
mjmcomputers 2 years ago
its exacly like a laptop power adapter, but its 5.5mm, and i cnt find where to buy any laptop adapter =/ its a dell 1702FP ...
yuriperiotto 2 years ago
I looked up 1702fp on ebay and found some
mjmcomputers 2 years ago
i dont really wanna buy stuff from ebay =/
yuriperiotto 2 years ago
I think I have that exact ACER 19" monitor (AL1916) with the same problem that it won't turn on.
Out of warranty so I'm going to try replacing some bad caps I found and also the SMPS mosfet which blew.
bakerbaker450 2 years ago
I have the same kind of display, it powers on, works okay, but after some time the backlight starts to flicker, I guess it's the same capacitor acting up.
Is there some kind of disassembly guide for this display?
sterby1 2 years ago
@sterby1 Sounds more like the backlights or backlight inverter. It wouldn't hurt to open it up and look for bad capacitors. I have another video on dis-assembly on this monitor.
mjmcomputers 2 years ago
I got one of these monitors for free too.
Cracked it open and guess what? Same problem, I bought two caps at Radio shack.
They were giant size but I squeezed them in. Also they're not hi temp 105c they're 85c, will that make a difference? I'm using the monitor now to write this comment.
Thanks, without this video I'd never been able to fix it.
b0arderb0y 2 years ago
The high temp will work, but not last as long. I would order the high temp ones and just have them handy. That power supply gets pretty hot and will eventually cause the lower temp capacitors fail.
mjmcomputers 2 years ago
if there's no power at all(no lights), you check caps and all ok, what would the problem be then?
saulei 2 years ago
I would start checking voltage on the power supply circuit. Also see if anything is burnt. What model is it??
mjmcomputers 2 years ago
WoW that could have been 2 minutes long not 9... replace bad capacitors =-]
Dully222 2 years ago
I had to reassemble too
mjmcomputers 2 years ago
how do i identify a bad capacitor
fabbeboii 2 years ago
Normally you can tell visually, the top should be flat, not bulged. There should not be anything leaking out the top. Sometimes they are bad and you can't tell visually, you have to remove them and check them with a ohm meter.
mjmcomputers 2 years ago
what should the ohm mte read when you check the capicators on a monitor/tv?
cristoretornebiblia 2 years ago
this is quoted from another site but how I test them. 1) Discharge the capacitor by shortening its leads.
2) put your multimeter in the high ranges 10K-1M
3)CONNECT MULTIMETER TO CAPACITOR LEADS(OBSERVE THE POLARITY IF ELECTROLYTIC). AT SOON AS THE LEADS MAKE CONTACT, THE METER WILL SWING NEAR ZERO. IT WILL THEN MOVE SLOWLY TOWARD INFINITY.
4) IF THE CAPACITOR IS BAD, IT WILL GO TO ZERO OHMS AND REMAIN THERE.
mjmcomputers 2 years ago
Thanks for the professional tip, can I ask if the monitor dosent power up how can I test the power supply with a multi meter? just assume nothing is wrong with the Capacitor
cristoretornebiblia 2 years ago
built in power supply or external power supply?
mjmcomputers 2 years ago
Built in power supply
cristoretornebiblia 2 years ago
If it won't power on, no lights or anything then your probably not getting voltage out of the power supply. If you can isolate which wires are the output you can check them with a volt meter. Check the power inlet and make sure you have power coming in. There is most likely something wrong with the power supply look for anything burnt or discolored, or dark areas on the circuit board from heat. Also check the fuses. What is the model number?
mjmcomputers 2 years ago
I just bought a Dell 1706fp from an electronics recycler and he gave me a 1704 that wasn't working. Well the next day the 1706 stopped working too. Same thing- won't power on. I got the 1704 totally disassembled so I guess I may try and buy some capacitors to try and fix them. I never soldered a capacitor before so let me learn how to detect a leaky capacitor first. If I wasn't so broke I would just trash them and buy a new one. But people need to avoid buying the Dell monitors.
djisfree 2 years ago
Actually besides this series of monitors the dells seem to hold up very well, I've seen failures on most other brands too. I have an NEC and a HP that I need to repair. Just look for capacitors that have a bulged top, normal ones are flat.
mjmcomputers 2 years ago
Well I went to RadioShack trying to find a couple of 1000uf 10v since two of them were buldging but RadioShack doesn't carry anything close. And a local tv repair shop was closed. Then I saw a guy selling both circuit boards for one of the Dell models online and he mentioned in the ad that if the video works intermittenly then it could be due to the video board. So the power board in the 1706 looked fine so I used that board with the video board in the 1704 and I have video now. :) Thanks
djisfree 2 years ago
I'm glad you got it to work. Check out Mouser for capacitors, maybe you can get the other one to work, dual monitor setups are nice....
mjmcomputers 2 years ago
I was just given an 17" LCD monitor that, when turned on, just flickers the desktop for like a second and then goes blank. It also looks like the monitor keeps trying to come back on but can't. Any common know problems for monitors behaving like this?
Dangrousdave20 2 years ago
Its most likely the backlight inverter, sometimes they can be repaired, like bad capacitors, but sometimes they just need to be replaced. It could also be the backlights.
mjmcomputers 2 years ago
focus man!
Bryanx89 2 years ago
my camera doesn't focus well up close. I bought another one that seems to do better, we'll see...
mjmcomputers 2 years ago
Thank you for this information! Thanks to your video I was able to repair and bring back to life a Dell 17" LCD monitor that was given to me, the one I repaired had the exact same leaky capacitor that yours had. :-) Thanks again!
dubya810 2 years ago
I just repaired one this week, before I saw your video. What kind of soldering setup do you have? I used a $15 Weller soldering iron and 67/33 tin/lead solder from Radio Shack that I'd bought many years ago, and both the desoldering the old caps and soldering the new ones was a bitch.
rkm0 2 years ago
I'm interested in the soldering Tools specs that you use would be very helpful thanks.
biggonyou 2 years ago
holy, they rapped you for those caps. They're really like 30 cents each. But still a guess a buck something isn't too bad
potc420 2 years ago
the normal caps are like 30 cents a piece, these are high temp 105 degrees which are more expensive. The place I buy them "electronic parts outlet" is much cheaper than radio shack and fry's, but more expensive than mouser. But shipping costs always makes mouser more expensive.
mjmcomputers 2 years ago
Yeah i was gonna say mouser is where its at. You can get the high temp caps for 30 cents a piece but unless you're ordering lots of stuff it's not worth it cause of the shipping
potc420 2 years ago
I guess I should go ahead and order some. I have already done 2 of these monitors, and they have about 10 more that I'm sure will die at some point.
mjmcomputers 2 years ago
Radioshack has the 470uf 35v which will work. You can use higher voltage ones without a problem. In fact they might last longer. Just remember to install the new ones the same way the old ones come out. Most have a positive lead and and negative lead. The - - - - on the cap means the negative side lead and the other side has no markings which is the positive side lead.
When replacing these keep the uf the same if possible and for voltage keep it the same or go higher.
jimmy101112000 2 years ago
the longer lead is always the positive
potc420 2 years ago
Thats true. But sometimes you need to trim them down to push the leads in the holes.
The real old Axial type were not marked. You had to look at the ends to tell which way they go.
I replaced caps in power supplies, Motherboards, Video cards. Hopefully my tv's don't do this but they probably will.
I also restored an old expensive stereo by recapping it. and 30 cents is cheap to me BTW. You get what you pay for on caps.
Mouser is real good since I used them to get my replacements.
jimmy101112000 2 years ago
i got a lcd monitor that,
whn i plug the power in....the power led on the monitor keeps flashing.
i checked the caps.and i seen 3 X 470µF 16V
that are buldged a lil......would that cause this?
those are the only caps that i seen that looked bad.
any tips?
applemonkey187 2 years ago
I would start by replacing the caps.
mjmcomputers 2 years ago
Thanks for the video. I got one of these for free because it would not turn on. I cracked it open and found the three leaky capacitors right off the bat. I ordered new caps on ebay (Radio Shack did'nt have this size) and made the repair with my son. Your vid was a great reference to have, Thanks!
rtfclb8 2 years ago
No problem I've done 2 of these model dells. I have a customer who has about 10 of these, So I will probably do all of them as they go out.
mjmcomputers 2 years ago
The layout is very, very similar to a samsung I opened up. I wonder if Dell actually makes their own monitors or just outsources it to other manufacturers.
illstateofmind 2 years ago
I think they make them, but not sure, The panels themselves are made by a handfull of manufactures, but everything else is probably made by dell.
mjmcomputers 2 years ago
how do open the cover to the monitor?
AznViolin26 2 years ago
I will post another video this week when I take apart the other monitor and show how to disassemble.
mjmcomputers 2 years ago
You Rock !! I followed your directions and sure enough, the 1000 Micro Farad caps were bad. I was able to find replacement caps at Frys (16 volts) for $3 each. Desoldering is always tricky. But once I got the old caps out, it was downhill from there! Again, my thanks!!
Mrimposibl 2 years ago
Yea, This seems to be a common problem with this model, I have another one I need to repair with the same problem.