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Old 12-08-2020, 06:33 PM   #1
dominik0801
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Default LG 60LA7408 vertical lines

Hello!

Next week I would have the opportunity to pick up an LG 60LA7408 TV for $60.

It produces the symptoms in the attachments.

What would you say? Does it seem like a "simple" VGL/VGH problem, that could be fixed with jumpering, and bypassing a tab?

Or does it seem to be more problematic for you?

I have never fixed something like this before, but I am willing to learn and experiement, but if it looks unfixable for you, I wouldn't buy it for nothing.

I saw something similiar on youtube: https://www.youtube.com/watch?v=khS6q_wNJZ8
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Old 12-09-2020, 12:19 AM   #2
neilc6
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Default Re: LG 60LA7408 vertical lines

Vertical lines are almost always panel issues with the TAB bonds, COF on the flexes, or the circuitry on the panel boards. Not repairable.
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Old 12-13-2020, 02:45 PM   #3
Nick's Tvs
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Default Re: LG 60LA7408 vertical lines

Try disconnecting half the screen. Turn your TV off and remove power. Then remove 1 of the ribbons between the T-con and the panel. Then power it on and see what happens. If the connected half now displays properly, then that means there is a fault with the half that was just disconnected and we can trouble shoot from there. If you still get lines on screen, then unplug the set and reconnect the disconnected ribbon. Now repeat with the other ribbon. If the screen shows properly on the connected half then once again the disconnected half is the culprit and we can diagnose from there.
If however the screen still displays lines then your T-con or main board may be the cause of the problem.
As neilc6 stated, this is most likely a panel issue, however there is a chance we can still fix it and or do a work around to allow the set to work.
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Old 12-13-2020, 05:53 PM   #4
budm
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Default Re: LG 60LA7408 vertical lines

By any chance that the tab bonding boards are located at the bottom edge of the screen?
__________________
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Old 12-13-2020, 06:56 PM   #5
dominik0801
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Default Re: LG 60LA7408 vertical lines

Well, after the answer of neilc6, I decided I'm not going to buy it. So I can't really give any answers.

The problem is, that even if I could fix it, the courier company that this online shop page uses, broke 2 of my last TV orders, which completely ruined my mood about buying TVs for the next few weeks..
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Old 12-13-2020, 07:56 PM   #6
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Default Re: LG 60LA7408 vertical lines

I would only PLAY with this tv if it was free. Most likely a experiment tab bond issue !
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