LG42LA660S flickering every 3 sec

[erjon]

Hello guys. I have LG42LA660S model with EBT62596128 main board, EAX64905701 power supply board.
My TV does flick every 3 seconds with double image. Also 3 horizontal lines on top of the TV. Before double image start, bright gets a little low and start do double the image. I have searched on net, but my TV does not have T-con board, is already integrated on main board, as per schematic of main board.
I took it to one technician and he was sure that is LCD panel problem, but I am not convinced, because is happening every 3 sec.
When i disconnect one LVDS ribbon half of screen is white and the other vertical line. same happens when i remove the other side. Only that when right side is disconnected 3 horizontal lines on top of TV cannot be seen.
On power supply board i can identify only some black part on the primary side as per attach.
My situation is like in this video.
https://www.youtube.com/watch?v=wn1E...ature=youtu.be
Only difference is that i get double image in all the screen.
Please what you think guys is LCD panel or mainboard or power supply.

[budm]

Re: LG42LA660S flickering every 3 sec

LCD panel problem.

[erjon]

Re: LG42LA660S flickering every 3 sec

Thank you for your replay. Is not strange that happens every 3 sec this process?that's why i was not conviced to be LCD panel.
So is not worth it take care of this tv since lcd panel can not be fix?

[jjanssen7]

Re: LG42LA660S flickering every 3 sec

Read through this post, especially post #8 and on. Your TV has almost the exact same LCD panel as the Sony in that thread.

https://www.badcaps.net/forum/showthread.php?t=61843

[erjon]

Re: LG42LA660S flickering every 3 sec

Well thank you jjanssen7. After reading your thread, post 8 and below, i try the same steps. I have put scotch on pins 1-3 which from schematic of this board is GMA1, GMA3 and GMA4, I don't have any jumping or double image. Ofcourse some small horizontal lines across the screen and also brightness jump a bit every 3 sec, but right now TV is watchable. Don't know if trying to cover other pins can help or not, but will try.

[jjanssen7]

Re: LG42LA660S flickering every 3 sec

You can eliminate the brightness jump by covering a few more pins... the first 8 or so from the edge usually does it for me... any less than that you still get a line jump/brightness jidder.

[erjon]

Re: LG42LA660S flickering every 3 sec

It is good when you have right. I did cover 8 pins and brightness jump disappeared. Everything looks normal. Even if i don't understand what this 8 pins does.
Picture is very normal, appart when i am on menu.
Anyway thank you guys, specialy jjanssen7 for the tip.

[erjon]

Re: LG42LA660S flickering every 3 sec

So far so good the picture. May God Almighty gives you jjanssen7 all the bests my friend.