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Old 05-02-2018, 10:38 AM   #10
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Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
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Posts: 36,212
Default Re: 55ub850v no picture

LG 6871L-3703M (6870C-0502C) T-Con Board.
There many power supplies Voltages that need to be tested.
Pictures provided by shopjimmy.
Attached Images
File Type: jpg TCON-6871l-3703m-V test points.jpg (2.27 MB, 15 views)
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.

Voltage Regulator (LDO) testing:

Inverter testing using old CFL:

Tear down pictures : Hit the ">" Show Albums and stories" on the left side

TV Factory reset codes listing:
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