Question about Sony KDL46NX720 - 46" BRAVIA NX720 Series 3D LED Black LCD Flat Panel

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Sony Bravia 40nx710, all of a sudden horizontal black lines appeared, picture is distorted.

Posted by Anonymous on

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 3 horizontal lines through screen and distortion

Yes this thing start happening to my tv too about 4weeks ago and this goes away in about 15 minutes. TV is only 18 month old and I donot have extende warranty. Please post the solution if someone has got it repaired. Thanks

Posted on Jan 21, 2010

SOURCE: My Sony Bravia 46' XBR46 LCD has horizontal lines

I hope this helps it seems Sony has extended warranty coverage for your TV for this issue.

http://esupport.sony.com/US/perl/news-item.pl?news_id=378&template_id=1

IF YOU FOUND MY SOLUTION HELPFUL PLEASE VOTE 4 THUMBS UP.
(any less hurts our averages)
Thank and Good Luck!

Posted on Feb 04, 2010

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

Posted on Mar 15, 2010

SOURCE: 46 inch Sony flat panel lcd has vertical red and

If the screen works for a short while and then completely fails once the TV warms up you have a problem with the main unit video board or the LCD control logic board. Most often if the picture cuts out but audio continues to work the logic board is over heating and should be replaced. However if the picture cuts out and audio shuts off as well then its your video input board.

Posted on Oct 16, 2010

  • 1 Answer

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.

Posted on Oct 18, 2010

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http://electronicshelponline.blogspot.com/

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Like this??

5af01cc.jpg
Horizontal drive has either data, voltage, or control problem from the pixel registry circuit......get it serviced before the problem spreads causing further damage.

However, in all likelyhood, the panel itself is bad. The Bravia line has had a bad rap about the faulty displays, and at $1800 replacement (plus labor) - it may be time to call SONY direct to complain!

Thanks!!
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1 Answer

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the video playback is sampled off the video out and independently processed sorta like a TV signal to project on the lcd screen.
horizontal lines means you lost sync circuit and needs troubleshooting. Hopefully maybe a bad connection with a ribbon cable for the ICs and components are hard to change and jammed tight. I would order a video board.

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