I made a post regarding my 70" LG TV a few weeks ago, I'm making a new post because I have a side inquiry. The following is from the original post:
"I have a 70" LG 4k TV. The model is 70UH6350-UB.BUSMLJR
I got it from someone who said it started to turn off on its own. When I got it, it worked fine for around 3 hours, then the backlight went out. You can still hear the sound and I did the flashlight test on the display and it was still working as well, so it was evident that the backlights went out.
I thought it would be a bad LED, so I successfully opened up the TV, got to the LEDs, tested one by one with an LED tester, and they all work just fine, there was nothing wrong with them, all showed the same voltage. So I cleaned the connections all around as I put it back, hoping for some reason it would work or something, but sure enough when I turned it on, it only worked for a few minutes and then the backlights went out again. I had accidentally burned out the power supply as I was doing some testing (whoops, I know) so I replaced with a new one from a trusted ebay seller and the same problem was there, so it can't be the power supply."
The update is that I bought a new set of LEDs for it (got very lucky since no one is really selling these). Before I changed the LEDs I wanted to take a look at the boards one last time just in case... and I noticed that the main board has a tiny little round button on it (see picture). I assumed it's some type of reset button. So I turned on the TV, was connecting my fire stick and sure enough the backlight went out. So I turned it on again, pressed that button on the main board and it turned off and on the TV. Doesn't look like a factory reset since it took me back to where I was before reseting it. The backlights have been working for the past 30mins, they have not turned off.
Do any of you have more information on that button on the main board? Do you think it's capable of fixing my issue or do you think the backlights will soon enough turn off again? I really want to avoid opening it up and replacing the LEDs.
"I have a 70" LG 4k TV. The model is 70UH6350-UB.BUSMLJR
I got it from someone who said it started to turn off on its own. When I got it, it worked fine for around 3 hours, then the backlight went out. You can still hear the sound and I did the flashlight test on the display and it was still working as well, so it was evident that the backlights went out.
I thought it would be a bad LED, so I successfully opened up the TV, got to the LEDs, tested one by one with an LED tester, and they all work just fine, there was nothing wrong with them, all showed the same voltage. So I cleaned the connections all around as I put it back, hoping for some reason it would work or something, but sure enough when I turned it on, it only worked for a few minutes and then the backlights went out again. I had accidentally burned out the power supply as I was doing some testing (whoops, I know) so I replaced with a new one from a trusted ebay seller and the same problem was there, so it can't be the power supply."
The update is that I bought a new set of LEDs for it (got very lucky since no one is really selling these). Before I changed the LEDs I wanted to take a look at the boards one last time just in case... and I noticed that the main board has a tiny little round button on it (see picture). I assumed it's some type of reset button. So I turned on the TV, was connecting my fire stick and sure enough the backlight went out. So I turned it on again, pressed that button on the main board and it turned off and on the TV. Doesn't look like a factory reset since it took me back to where I was before reseting it. The backlights have been working for the past 30mins, they have not turned off.
Do any of you have more information on that button on the main board? Do you think it's capable of fixing my issue or do you think the backlights will soon enough turn off again? I really want to avoid opening it up and replacing the LEDs.
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