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12-08-2020, 06:33 PM
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#1 |
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Member
Join Date: Feb 2018
City & State: Debrecen
My Country: Hungary
I'm a: Knowledge Seeker
Posts: 61
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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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12-09-2020, 12:19 AM
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#2 |
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Badcaps Veteran
Join Date: Nov 2015
City & State: BC
My Country: Canada
I'm a: Knowledge Seeker
Posts: 1,379
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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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12-13-2020, 02:45 PM
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#3 |
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Badcaps Veteran
Join Date: Jan 2014
City & State: Tucson Arizona
My Country: USA
Line Voltage: 120vac 60hz
I'm a: Professional Tech
Posts: 602
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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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12-13-2020, 05:53 PM
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#4 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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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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12-13-2020, 06:56 PM
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#5 |
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Member
Join Date: Feb 2018
City & State: Debrecen
My Country: Hungary
I'm a: Knowledge Seeker
Posts: 61
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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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12-13-2020, 07:56 PM
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#6 |
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ajshoe
Join Date: Dec 2012
City & State: cincinnati, ohio 45215
My Country: usa
Line Voltage: 120VAC 60HZ
I'm a: Hobbyist Tech
Posts: 384
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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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