LCD TV Repair made easy # 8

http://tvrepairinfo.com
This video shows the value of understanding how some of the shutdown and feedback circuits work in an LCD computer monitor and or LCD TV since many of the same principles apply. It also shows me demonstrating the value of using hold back lights to help you determine if your inverter board is working correctly.
If your a professional looking for more understanding on how to repair LCD TVs or an electronics hobbyist here are some great resources.
Troubleshooting & Repairing LCD TVs by John Preher at
http://davestv.jptv97501lcd.click2sell.eu
For someone new to electronics the first few pages of this book may be a bit challenging but the majority of this book is easy reading with lots of pictures,diagrams and useful troubleshooting techniques. Johns book gives you a good idea about the main test points you should look for and their approximate voltages.
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How to troubleshoot and repair Switch Mode Power supplies by Jestine Yong at http://davestv.jestinemichellepow.click2sell.eu This book is a bit spendy and unless you do this as a profession it's probably hard for most people to understand why anyone would pay so much for an ebook. Nevertheless since TV repair is my business I can honestly say this is the most helpful book on power supplies I have ever read. In my opinion it's a must read. Jestine is good at getting right to the main points you need to understand about troubleshooting this kind of power supply and its associated feedback circuits.
Since a majority of the problems I have seen on LCD TVs are related to bad power supplies I figured it will pay for itself many times over. Most of the book was easy reading with plenty of pictures and diagrams.
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Testing electronic components and finding unknown resistor values by Jestine Yong. http://5d8388ioop4nfm862d1b0u7sbj.hop.clickbank.net/
I have not yet read Jestines book on Testing electronic components but I was told it's a good one for a person just starting out in electronic troubleshooting.
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How to repair LCD Computer Monitors by Jestine Yong at
http://davestv.jestinewilliamlcd.click2sell.eu
Even though this book was about computer monitor repair I found most of the troubleshooting techniques he demonstrates also applied to LCD TV repair so I was glad to have read it. Much like the book on Switch Mode Power Supplies it was easy to read and similar to Johns Prehers book on LCD repair but in Jestines own style. It had lots of pictures and good troubleshooting techniques.
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Mikes TV case histories The latest paperback edition has 1300 case histories on LCD, CRT, Plasma and Projection TVs. at http://www.mikestvtips.com/ 1-410-272-4984
When I first started in the TV repair business and my troubleshooting skills were not that great often times Mike's case histories told me exactly which parts I needed to replace and it often saved me from having to purchase a great many schematics. I have been using his case histories since 1995 and I would not be with out them. If you call him please be considerate of his time zone and call between 11:00 AM TO 8:PM Eastern time only.
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John Prehers LCD TV case histories at
http://davestv.jptv97501lcd1.click2sell.eu
This ebook has 56 case histories on nothing but LCD TVs
and which parts he replaced to get them going. I found this ebook was helpful in better understanding the connection between certain symptoms and their causes. Right now it's only 10 dollars.
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Getting Started In Electronics by Forest Mims available at some Radio Shacks or through this link.
http://www.Forrestmims.com
If you know nothing at all about electronics and want to start with the basics this is a fantastic book to start with. This book is packed with pictures.
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brought to you by Dave's TV in Grants Pass Oregon
541 479-3915

Category:

Education

Tags:

• LCD TV repair
• TV repair
• LCD TV
• Repairing your own TV
• Television troubleshooting
• Television repair
• Television repair tutorial
• DIY TV repair
• blue ring tester

[lennypen1978]

hi great video,, my philips 42" lcd has stop receiving an HDMI signal from both ports ive been told that its the main board thats at fault and will need replacing or fixing,, im pretty good at circuit repair but was wondering if you might know which part of the main board thats at fault,, cheers

[GrantsPassTVRepairs]

@lennypen1978 Some TVs have a separate board with all the input ports often called the jack pack. It could be a bad component on this board but I don't know for sure.

[chevy56123]

Dave would it be possible to take the plugins from a tv inverter board to the backlights from another tv and hook up an external backlight to see if it was the transformer or backlight?If so how would you connect the plug to your external light?

[GrantsPassTVRepairs]

@chevy56123

If you mean to add extension wires from the inverter board output from one TV to the other TV just to see if your back lights are working I would think it might be okay but I have never done it that way. Sometimes I do this with an external transformer just to see if my back lights are okay, but you can't always tell if you back lights are okay when looking at the front of the display because of the polarized lenses on the display so I momentarily tap the screen when doing this

[THEtechknight]

tip3055 works awsome in place of the original transistors in that benq/dell monitor. ive worked on dozens. and actually ran into 2 of them i had to change out all 4 cathodes.. not cheap....

[GrantsPassTVRepairs]

@THEtechknight  Thank you for the info on the transistor sub. I can see by your comments you have a good eye for detail and a great memory as well.

[rhblakeman]

@rhblakeman oops SC5707 (typo)

[rhblakeman]

A lot of monitors suffer from failed SC5705 transistors, others from bad caps.

[lennypen1978]

@GrantsPassTVRepairs yes my tv has this separate board,, i thought this was called the main board, it looks like the most complex one of all of them and its what all the imput connections plug into,, ive had a look at it and cant seem to find anything at fault, if i post you the make and model could you please tell me the best place to find the parts i need to fix it,, thanks :O)

[grenadasblessed]

sup man i have a 32'' westinghouse lcd tv and frecently the screen will g blank and the sound too but the tv power will stay on it does not go in standby mode. and it wll not come back on till i rest it for about a week or so. it will work fine for ablout a month if am lucky then will go out again. what do you think?