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Lg 34lh20 tv screen lower half of coming horizontal colour lines in time by time

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It can be power supply, T-CON board, ribbon cables, LCD panel.
Please download and learn about the T-CON/LCD panel problem to help you narrow down the problem.

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

Posted on Jun 03, 2011

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Posted on Jan 02, 2017

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Top half of tv is white it started with just a line from side to side and has become worst


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Feb 03, 2016 | Televison & Video

1 Answer

LG 50" plasma PDP50X4 only shows top half of screen, sound and top half of screen work fine....Help!


That's a relatively easy one - you have either upper or lower Y-Sustain buffer board gone bad.

if the last chip of the upper buffer has failed you may get what you get, even that this is a relatively rare type of failure.

The same would happen if the lower buffer is bad although this is again somewhat rare for a failure for those boards.

Either way you need a new buffer board and I'd start with the lower if I were you.

I assume nobody has messed up with the TV because another possible explanation would be the two buffer boards were disconnected from each other.

The best is they are neither too expensive nor hard to replace.

Hope this helps!

Oh, here's a link with something more about those boards although I am not sure it would apply to your particular case...use it as a good educational resource, but don;t expect to have the exact problem described there:
http://blog.coppelltvrepair.com/2010/10/vertical-or-horizontal-color-lines-in.html

For more help please use www.coppelltvrepair.com/diagnose ..

Sep 30, 2012 | LG Televison & Video

1 Answer

A horizontal white line is appears in my LG Flatron colour tv in the middle of screen suddenly and the pictures disappears but the sound keeps on but when i restart the tv the pictures comes what would be...


Tap the top of the TV and if the picture comes on in full screen then it is possible that there are DRY SOLDERING points on the board.
use a good iron to touch up the soldering on the vertical and horizontal sections, the driver IC's. get help if you are not able to do the job but it seems a minor job.

Jul 05, 2011 | Televison & Video

2 Answers

Screen got black lines across it


Across vertically or horizontally... It makes all the dif. It could be 3 boards on the set. The YSUS-main the YBU-upper/YBL-Lower. The Y buffer upper controls the top half of the screen, the Y buffer lower the lower half and the YSUS-main controls those 2 boards. They work in unison, when one goes they all fail. The other possibility is dry solder joints on the the D, G, E, F boards. All you would need to do with that is reheat the solder joints at the ribbon cable conx.

Best Regards and Semper Fi

Aug 06, 2010 | LG 42LC2D 42 in. LCD HDTV

1 Answer

Brand new lg plasma 60" flat panel tve has horizontal lines accrss the screen only half way up from bottom. When you go close to tv, it looks like lots of of dots.


Hello Fixya customer,

Thank you for your question.

The are a couple of possibilities here including the logic board, lower "Y" board, lower "Y" buffers, and PDP panel. The "Y" is divided into into the lower and upper half of the screen. An experienced technician can quickly isolate the fault upon inspection and verify the supply voltages.

Thank you for using Fixya, and if I can be of further assistance please let me know.

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1 Answer

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change the channel up 7 times and go back to the station

Nov 14, 2009 | Televison & Video

1 Answer

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something fried .. sounds like the vertical has gone ,
call a tech.

Mar 07, 2008 | Televison & Video

6 Answers

LG PLASMA TV WITH COLOURED LINES OVER SCREEN


If the Video (Picture/Pix) is gone but you can hear the Audio (sound), then it could mean the YSUS PCB Assembly is gone/kaput/finish. Can replace the PCB, not repair the PCB due to timing circuitry involve. Cost maybe roughly $500 depending where you located. The PCB is located on the left hand side of your TV when you are facing the back (Back open). Might find 3-4 brown flex membrane connecting to the plasma panel. The PCB has a silver or black aluminum heatsink (big) on it.
Good Luck.

Dec 22, 2007 | LG 42PX5D 42 in. Plasma HDTV

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