I have a Sony 42" Bravia, model #KDL-40V2500 and a few months ago a horizontal line appeared 2/3 of the way down the screen, running left to right. It is strongest on the left side and fades out towards the middle of the screen. Since then two more of these identical lines have appeared. TV is two years old and out of warranty. Any options?
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SOURCE: Sony Bravia KDL-40V2500
The panel or TCON board has failed, the solution is the same replace the panel. Not worth the cost, get a new TV
SOURCE: 12 little horizontal lines in Sony Bravia KDL-52W4100
we have the same exact tv and it is not even a year old. we are told that it is the display panel and it is a well known problem with this tv. we were also told that there is a shortage of these parts. they had 283 on order, but only received 35. you need to call sony and tell them that you have this problem. they should warranty this for you even if your tv is 3 months past the warranty period. since this is a well known problem with this tv, keep on them.
Testimonial: "It in fact was a part of the lcd panel...the t-con board. I was able to research it and bought a box of parts off of a tv like mine and fixed it. Ron"
SOURCE: sony bravia kdl 32l4000 - color bars running vertically on screen
In most cases is the screen is covered with vertical lines all the way accross the screen then the T-Con module is at fault. The t-con board is replaceable without having to replace the entire LCD panel which would usually make it cheaper than replacing the TV. The part number I come up with is 1-857-213-11. Please take a moment to rate my answer. Thanks...
SOURCE: The TV has horizontal lines across about 5 inches
Horizontal lines are relatively rare problem in LCD TVs.
The likely problematic areas are:
1) The LCD itself (the micro ICs embedded into the LCD panel structure); that doesn't sound likely based on what you say, but it's not completely impossible. The bad news is it's mostly uncurable.
2) The power board A-1511-322-D G5
Power boards may sometimes cause problems with display, although rarely causing horizontal lines.
I wouldn't start looking here either, but it is certainly a problem to consider.
3) Main board 1-876-561-13 R1506072C
Slightly more possible and yet not quite likely. A high operating temperature and bad SMD soldering process may cause some soldering contacts on the main board to behave differently when the board is cold versus when it heats up. It is very common and may have all kinds of different effects on the TV and the screen.
One way to check for that is with a regular dryer..the process is explained in many other solutions at fixya and around the net, so I wouldn't repeat it here...but it takes time and patience.
4) The most likely place to start with is the T-Con / LCD controller
404652ASNC6LV4.1 M139.
I'd first replace that and see if the problem goes away.
5) There's a very minor chance that the LVDS cable that connects the main board with the T-Con does not make good contact initially and changes that as a result of getting hot. It's easy to just touch and move it lightly when the TV is still cold to see if it has an effect on the picture.
Sorry I couldn't just nail it for you, but that's the nature of the repair businss :-)
Bobby, www.coppelltvrepair.com
SOURCE: have horizontal lines across the screen and some
Yeah we have the same exact problem here. Defective TV....ours would correct itself after 30 mins, but now it's blurry all the time. I'm never dropping 2K on a SONY tv again.
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