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Televisions made by the Chinese multinational electronics company, TCL.

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TCL Roku tv turns on with logo for a fraction of sec, then black out

Hello, I have Model 55S405 TCL Roku TV. When I turn it on it flashes roku tcl logo for a fraction of sec and then screen blacks out. I unplugged tv for 15 mins and overnight , I tried to reset it by pushing reset button and I tried reset from roku remote using “home button 4 times, up arrow 1 time, rewind 2 times and forward 2 times” but nothing worked.

please let me know if there any other way to fix it

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@tapan when this “and then screen blacks out. “ happens, in a darkened room, shine a flashlight at an angle against the screen. Check to see if you can make out shapes, silhouettes etc. TCL has issues with backlight failing. If you can make out silhouettes it is most likely the backlight array that has failed. If not, you will have to remove the back cover and check the power board. Measure the outputs to the main board as well as to the backlight LED’s. Let us know what voltages you get. Post some good pictures with your question so the we can see what you see and follow your troubleshooting to help you out further.

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I have the same problem. How do you jump out the safety circuit to get to test it. I use to be an electrical engineer

Can you send me a pic so I know?

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I had exactly the same problem. I found a temp fix for it at the moment, but it is not an ideal solution.

Anyways, I believe the problem is caused by 1 or more faulty LEDs in the back. I believe this somehow alters the voltage and it somehow triggers a safety mechanism to turn the LEDS off(since they are working at start). I figured that lowering brightness might lower the voltage on the LEDs and that it would not trigger the safety mechanism. I put it on the darkest settings(I turned on the T.V in a pitch black room to be able to see the settings). I turned it back on and it was working. However, it sometimes still triggers what I assume to be a safety mechanism of some sort every once in a while. I just turn the T.V off and on and it should work. If it does not work, then just unplug and redo it.

I know this is not a good fix, but at least it allowed me to watch a Star trek episode on it.

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Tapan Parmar 가/이 대단히 고마워 할 것입니다.
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