Philips LCD 2008 On startup, TV would light up with "Philips" screen and then go dark with sound. Installed new TCON and it failed after 10 days. Bad luck or something causing TCON boards to fail?

Hi Ralph, you have a bad tcon board or a bad panel, this model had a lot of both panel and tcon issue, finding a board may be difficult and expensive.

Press the TV menu button. If no menu appears the problem could be a bad tcon display board or backlight inverter board. Turn off the room light and check TV for backlight glow. If it has a glow then the problem can be a loose tcon connection or bad tcon board. Check connections.
Or it could be,
Possible TV Back-Light Inverter Board Issue:
To see if the back-light has gone out, turn the TV on. Turn the lights off and make the room dark. Shine a flashlight onto the screen at different angles. If you can see some of the picture then the back-light has gone out. (It should glow a slight grey if it’s working) To fix this you need a TV backlight inverter board. You can buy one online for a relatively low price. Usually the board will have a few bad capacitors on it. You could attempt to repair it yourself if you can identify which capacitor has gone bad. A capacitor kit for a TV board is ultra cheap. You are best off buying the backlight inverter board and installing it yourself. A back-light inverter board should be from $10 to $25 dollars depending on your TV model

pixel drop out.

that would be a failing tcon board on the back of the screen.you would need to replace this part but they are available on ebay the part number is on the tcon board. match the numbers a version number to get the matching board for the screen. tcon board is the board were the main wire cluster goes to the screen board this is the tcon board.

Generally horizontal lines are caused by the panel failing, you can try a new tcon but I don't think it will help.

That can be bad connections on the ribbon cables between the LCD panel and the T-CON board.
Please download and read about T-CON/LCD panel symptom and troubleshooting here:

SONY T-CON: E40951307-TCON Troubleshooting 10-22-09_OPT

http://www.scribd.com/doc/25276757/E40951307-TCON-Troubleshooting-10-22-09-OPT

PDF download: http://www.mediafire.com/?zzjygannjty

LCD panel: http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.

Breaking down after 3 years is about right for LCD TV. It sounds like the T-CON board has gone out. Does the on screen menu look normal?
Learn about failed T-CON/LCD panel here and also read my guide to understand more.

http://www.scribd.com/doc/25276757/E40951307-TCON-Troubleshooting-10-22-09-OPT
http://www.mediafire.com/?zzjygannjty PDF download

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: www.interliquidparts.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Did you already try reseating the ribbon cable between the T-CON and the LCD panel yet. It does not sounds like bad screen. Screen is the most expensive part of the TV, just GOOGLE the part number as shown on the LCD panel to ifnd out how much it will be.

Learn about T-CON/LCD panel failure mode (TV works the same), :

T-CON: E40951307-TCON Troubleshooting 10-22-09_OPT

http://www.scribd.com/doc/25276757/E40951307-TCON-Troubleshooting-10-22-09-OPT
http://www.mediafire.com/?zzjygannjty PDF download

Service manual:http://www.polaroidsupport.com

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

It can be T-CON board, ribbon cables between the T-CON board and the LCD panel.
Learn about T-CON board failure here: Please download and look at the sample of bad pictures:

http://www.scribd.com/doc/25276757/E40951307-TCON-Troubleshooting-10-22-09-OPT
http://www.mediafire.com/?zzjygannjty PDF download

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Hi

There are some circumstances for which this type of problem occurs to your TV....

You'll need to do this in the dark or low light conditions! Make sure TV is off. Now turn on the TV. If the TV "glows" when you turn it on, the problem is the TCON board. There is also a slight chance that it's the main input board...but this is less likely. However if the TV does not "glow" when you turn it on, the problem is the back light inverter boards.

Also hold a flash light to the screen after it goes off and see if you can see a faint picture. Sounds like your backlight might be cutting off. Repair can be expensive but some of the newer units don