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TCL Roku 65" Black screen, no back light, audio and picture ok.
I have a TCL Roku TV that has a black screen. The back light will sometimes flicker and show the screen but there is no back light. Since all the LEDs light up whey it does flicker, i decided to throw a new LED driver in thinking that may be the problem.
ANSWERS:
"@sailor_dan not quite sure about the replaced the LED driver (IC) on the board or if you replaced the driver board. The main board is only responsible for telling the power board to tell on the backlight. Check the voltages going to the LED drivers with a voltmeter. you can also continue to measure it when the light is off. Let us know what voltages you get (set your meter high (~300VDC). It is possible that this is a LED backlight array error so if you maintain the voltages you know to check the backlight strips (The LED’s may still be okay just heating up and turning off). Post pictures of all of your boards with your QUESTION so that we can see what boards you are working with since schematics are impossible to get.
Adding images to an existing question"
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