4 No Sound/No picture/No backlight.
Hello,
I have an LG 65UB9500 4K TV 2015, last night I was watching it and it suddenly froze up.
After I turned it off and never came back on with a picture, or sound.
When I turn the TV on it produces no wake-up sound and has no backlight.
The power supply board control LED flashes 5 times (the error code?) after a minute or so of being turned on.
The power supply board produces good +3.5;+12;+24, but no +88.2V (LED PS)
The TV turns on when I turn on the Blu-ray player if it helps with troubleshooting.
Any help would be appreciated.
Update (09/29/23)
Here is the picture of my power supply board.
Questa è una buona domanda?
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10 Commenti
@alecblinetsky Can you take the back off the TV and upload pictures of all of the circuit boards inside? Aggiungere immagini ad una domanda
da Andrew S
@alecblinetsky "When I turn the TV on it produces no wake-up sound and has no backlight." what does it do? Do you have the power LED on? Any blink code? Are you saying it works when you "The TV turns on when I turn on the Blu-ray player"?
da oldturkey03
@oldturkey03
I do have the power LED/LG logo lit when power is on.
The internal LED on the power board blinks 5 times.
The TV turns on by turning on the bluray player - I would think it indicates the main board communicates with the PSB property.
da Alec Blinetsky
@alecblinetsky disconnect the LED backlights and see if that changed anything.
da oldturkey03
@oldturkey03
It does not, Tested LED with a special tester, which lit up them at 190V.
But the PSB says it should be 88.2V
da Alec Blinetsky
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