Identifying bad capacitors part 2

[FukinExplosions]

820uF are common to pop on motherboard. Every motherboard with 820uF capacitors i have seen are either bulged or popped. It is hard to get 820uF caps so i use 1000uF and they work fine.

[interfixes]

where can i buy the capacitor?

[mjmcomputers]

@interfixes mouser or ebay

[XxxGamer5641xxX]

On the broken board, the first one you showed, Is that stuff on the heat sink thermal paste? Looks like a clumsy job to me, unless, of course it is deliberate...

[mjmcomputers]

@XxxGamer5641xxX It's dust from where the processor heatsink and fan blew it on to that heatsink.

[XxxGamer5641xxX]

@mjmcomputers Ok, I get it!

[bma852]

can a capacitor leak from the bottom? I've got black gunk leaking from the bottom of a capacitor and it has corroded other joints around it.

[mjmcomputers]

@bma852 Yes, especially the smaller ones, they tend to leak out the bottom and normally do alot of damage to the board.

[JBDenver]

I have a 6.3v 560uf fujitsu capacitor on my ASUS Rampage II Extreme Mobo. I have been trying to find a replacement for this capacitor and the best I can find is a 6.3v 680uf capacitor also by Fujitsu (Must be old, since they sold their manufacturing) If I put this one in, what are my risks?

[mjmcomputers]

@JBDenver I wouldn't change the capacitance value. You are safe to go higher on the voltage though. Have you tried mouser dot com?

[tribalmasters]

They don't make em like they used to! Well, apart from the modern ones with solid capacitors anyway hehe



[theater40]

one more note but seeing as u no it all lol

my girlfriends mom has a old tv, big one to and it seems that it takes a while to turn on like u gotta plug it in, hit the on button and wait 15 minutes for it to turn on this a bad capacitor or what

and its rough more then 20 years old

[mjmcomputers]

@theater40 It could be some bad capacitors in the power supply, you would have to open it up to see. If it has surface mounts caps, they are sometimes hard to tell visually if they are bad. So, it makes repair difficult.

[theater40]

on another note i think my ram for my laptop must be over heat because it freezes not blue screen makes noise i let it col down and it works i removed a panel and it seems to be working fine now

any idea if it is or isnt

[mjmcomputers]

@theater40 Check out the heatsinks by the fans and make sure they are not clogged. Blow some compressed air in there to clean out the dust.

[theater40]

where do u get all these mother boards!!

also i have a question i have a older pc

it turns on when i turn my light for my bed room on

the pc is in my room

[mjmcomputers]

@theater40 These were all boards that I replaced from customers PCs that died. Sounds like your pc may be on a switched outlet with your light switch.

[Knaeckebrotsaege]

also, some good brand cap makers have had their lemon series too..

for example, Nichicon HM and HN series had a problem with overfilled (too much electrolyte in the can) caps from 2002- 2005, making them pop open..

Nippon-Chemicon KZG are OK, but can't stand heat at all, which makes the CPU VRM area (= around the CPU socket) pretty much the worst place to put them in. they either bulge and leak ontop or fail without bulging at all.

bad brands like G-Luxon and OST are replace on sight caps

[Knaeckebrotsaege]

lol.. why don't u name the worst motherboard manufacturer ever when you mention that it's a "cheap brand board"? ECS Elitegroup is the absolute lowest tier of motherboards. cheapest worst crap you could ever en counter... lol

also.. only replacing the obviously popped caps isn't gonna fix anything.. (unless they are from known good brands (nichicon, rubycon, nippon chemicon, sanyo, panasonic, samxon, etc.))

[mjmcomputers]

@Knaeckebrotsaege Yea, I'm not crazy about ECS but that one with all the bad caps is not an ecs, There's actually no name brand on it just a model number. Yea I normally don't bother with fixing a board unless it is a asus or gigabyte. I will normally replace all the caps of the same value if one is bad.

[Knaeckebrotsaege]

@mjmcomputers it is. from what i can see in the video, the design looks A LOT like the dreaded ECS K7S5A (SiS 735). or maybe more like the K7S6A (DDR-RAM only ; SiS 745)

ECS K7S5A = PCChips M830LR / M830LMR = Amptron K7-830XLM = JUNK

ECS, PCChips and Amptron are the same company. heck.. you can even crossflash the BIOSes of those 3 boards listed above as they're 100% identical (except board color and chipset heatsink)

[Modernelectronics]

Seems to be a common problem especially with computers. Bad Design or just cheap parts. Thanks for your Video .

[mjmcomputers]

@Modernelectronics Yea bad design, cheap parts, and heat seem to be the cause, at least from what I can tell.

[Watcher3223]

@mjmcomputers

More than likely, substandard parts. Replacing with capacitors made correctly using properly prepared materials will fix the board, provided the board is even worth repairing.

I've gotten though fixing an external hard drive power supply as it had two bulged caps (both 105 centigrade 16VDC at 1000 MFD, more than likely low ESR model) made by Capxon.

Problem: drive wouldn't spin up, even though volts were there. Replaced caps and drive spins up now.