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Old 03-09-2019, 12:40 PM   #1
guix
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Join Date: May 2018
City & State: Troyes
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Default LG 55UH615 : panel problem, is it repairable?

Hello all,

I bought a tv LG 55UH615 that has no picture but sound and backlight working. As an amateur I though obviously that it was the TCON board so I bought one, but still no picture with the new one. I was about to buy a main board, but after a closer look I discovered there is a short circuit somewhere on the panel's right driver board (the one on the left, when looking from the back of the tv). Please look the attached video where I test for shorts on ceramic caps. There is no apparent damage, corrosion or traces of water, the COF looks fine, no traces of heat or burns...

What can I do about it? Do I remove caps one by one, until the multimeter hopefully stops beeping ? Then I replace the bad cap(s)? If so, how to find their value if they are broken?

Or is it most likely a problem with a COF, so I cannot fix it?

I saw some youtube videos of people fixing their panel driver board by replacing damaged caps, but it was caused by water/corrosion damages so it was obvious, which is not my case.

Thanks !
Attached Files
File Type: zip panel_board.zip (7.98 MB, 48 views)

Last edited by guix; 03-09-2019 at 12:42 PM..
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Old 03-08-2020, 05:27 AM   #2
guix
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City & State: Troyes
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Default Re: LG 55UH615 : panel problem, is it repairable?

Forgot to update

As suspected, it was a bad cap at the bottom of the LCD panel, I replaced it using cheap "Yihua 938D smd hot tweezers", worked great, tv is repaired

Last edited by guix; 03-08-2020 at 05:31 AM..
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