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SONY TV KDL-46WL140 with bad picture problem

Bad T-CON board will cause bad picture (light shadow bars) as shown below: by Bud Martin




T-CON board is under the metal shield


T-CON board


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.

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horizontal lines on tv


if your tv is a crt type, you could check the vertical section which the vertical ic get bad or has burnt parts.but if your tv is lcd type the cause would be a bad t-con board.the t-con board is mounted covered with metal shield.

Feb 12, 2013 | Televison & Video

1 Answer

My Vizio HDTV has green/red snow on dark/white colors and it usually disappears but now it comes back for very long periods of time. I've done research and its come down to the LVDS cable. So, what are the steps to replacing an LVDS cable in my 32" Vizio HDTV?


Usually if the LVDS cable between the main board and the T-CON board is bad, you will loose one of the three color signals, you may have thermal problem with the T-CON board. I would run the TV with the back open to see if it will take longer for the problem to appear, or get a can of freeze spray for electronic troubleshooting and cool down the T-CON board (board is under the metal shield that you will have to remove to get to all the cables, I would remove the shield and put the screws back in to keep the T-CON board in place).
The TV as shown in my album has bad T-CON board, the pictures get pixelated and scrambled after about 1/2 hour, I was using a small fan to keep it cool until I finally found a replacement T-CON board. Bad LVDS driver IC on the main board can also be the problem. Right now we need to find out if it is heat related problem or not.
http://s807.photobucket.com/albums/yy352/budm/VIZIO%20L32HDTV10A/

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: 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.
Please post back what you find.

Dec 31, 2010 | Vizio L32 32 in. LCD HDTV

3 Answers

what does tcon board look like?


The T-con board sits at the very top of the lcd display in the middle. The normal size is about a 4x5" square. Sometimes very difficult to get to. Be very careful with plug that attaches to the board.





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Nov 27, 2010 | Microsoft MT-SYTPT3227AB 32 in. LCD TV

1 Answer

LG LCD tv screen went white? Still have sound and can change channels but no picture?


White screen may be caused by failed T-CON board or it is not getting the 12vdc or signals from the main board. Check the fuse on the T-CON board first, T-CON board is mounted under the metal shield.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

Aug 12, 2010 | LG 42LG50 42 in. LCD HDTV

1 Answer

I have vertical bars on screen


Hello,

The T CON board of the television is bad, you need to replace this
The T-CON (Timing Control or LCD controller) board (on the LCD panel assembly). It transfer the universal image signal of TTL and LVDS signal to specific TFT (Thin Film Transistor) LCD.
This is the interface board that talks to the Logic board and the LCD panel to produce pictures on the screen. White/gray glowing screen when it fails or not getting the voltage from the logic board (the 5 or 12vdc is supplied by switched transistor on the logic board). Notes: T-CON board is mounted under the metal cover shield.
Common failures:
Scrambled pictures, Lines, multiple pictures, color smears/blotches, rolling pictures after warm up.
Blown surface mounted fuse.
No pictures, very dark screen almost like there is no backlights.

Hope this helps........

Jul 30, 2010 | Sony KDF-E55A20 55 in. LCD Television

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