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Old 09-26-2021, 04:34 AM   #1
Join Date: Oct 2019
City & State: Sydney
My Country: Australia
I'm a: Knowledge Seeker
Posts: 40
Default TCL 65" U65E5800FS - Black shading after startup

Hi all,

TCL Model U65E5800FS (AUS)
D65A620U (CN equivalent)

My 65" TCL just started doing something strange. I searched the forums but couldn't find any threads covering the exact issue (possibly not using the right keywords).

When I turn it on the title screen displays normally... a brilliant, consistent white with no artifacts and the TCL logo in the middle.

Within 2 sec to 2 min the left and right side of the screen go dark, creating a vignette with only the centre illuminated.

Same issue using my PC as the source.

I have tested the issue with two separate sources using two different HDMI cables in all 4 HDMI ports. Same result each time. So it points to a hardware issue with the TV.

I assume it's not a problem with the backlights since the title screen it fine.
I also assume the T-Con is ok since the picture is still normal (albeit dark).

I suspect this problem is similar to the seemingly common issue others have experienced with just one half of the screen going dark. But thought is was worth running it by everyone in case it was something new or different.

Would it be something like a failure in the voltage supply to the backlights? Something that works correctly for a little while then gives out? Bad capacitor for example?

Any suggestions or help with troubleshooting would be much appreciated.

Many thanks
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Last edited by Stuckster; 09-26-2021 at 05:53 AM.. Reason: Typo
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