Picture horizontal lines!!

If you can, please provide a picture.

unfortunatly, horizontal lines on an lcd tv, almost always mean a bad lcd panel. if it is out of warranty, it will be really cost prohibitive to replace the panel. if the set is only a year old or so call sony customer support and ask for a concession for the part.

The board that call the T-CON board it is dying and dead soon.That why it is causing horizontal or vertical lines and distoted pictures.This T-CON board sit in at the bottom in the middle of the tv LCD screen panel and it only job are to decoded pictures pixels before it go onto the tv LCD screen panel.Tries websites Shopjimmmy.com,Ebay.com to buy a whole new refurbish T-CON board for the replacement.

That sounds correct, I just have to work on SONY BRAVIA KDL-40BR4 with Horizontal lines problem on ther right side, you you tap around the frame, the lines will come and go, this is only 2 years old TV! Poor quality panel made by SONY/SAMSUNG company jointed venture.
Very sad indeed when you paid for BRAVIA series which are not cheap.
New screen will cost more than new TV.
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

I have the same tv model KDL-40W4100 and around the same age. At the moment I have 16 of
these horizontal lines over the entire screen and they seem to be grouped into 2 lines per row. They are also around 4 inches and two pixel rows high. I have been looking over the Internet for months and found nothing to troubleshooting this issues. In the last few weeks more and more of these groups of lines have been showing up and now i am up to 16 of them and it is becoming unwatchable. Any help from anyone would be greatly appreciated. I also attached a picture to describe it better. Thanks!

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.

try cleaning T-CON Board to Lcd panel cable

HI
SO IN THIS CASE YOUR LED TV SCREEN IS DEFECTIVE PLEASE REPLACE THE SCREEN
THANKS
M NASIR

This is not a solution but a correction . I stated that there was vertical lines but that should be horizontal Lines. I am having a tech come tomorrow to look at it as it is still under waranty.
Thanks

First, HORIZONTAL CENTER.
1) Press MENU.
2) Scroll to SETTINGS.
3) Scroll to SCREEN.
4) Go to HORIZONTAL CENTER. Move the picture to the right. Hopefully, the line will go away. Otherwise, there is a problem with the pixels or the signal processor. Call 1-800-222-SONY. Or, http://eservice.sony.com. Have a high-limit credit card handy for out of warranty repairs. Sorry about that.