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Old 11-07-2019, 11:18 AM   #7
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Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
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Posts: 36,767
Default Re: TCL 55S401 LED LCD TV no backlight

Lets see some good clear pictures of what we are dealing with.
Opening up the LCD panel is the LAST thing you want to do.
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:

Last edited by budm; 11-07-2019 at 11:29 AM..
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