Chosen Solution

I’m hoping that someone might be able to help me determine what parts I would need to purchase in order to fix my LG 55UH6030-UC television, if it’s able to be fixed. Here is the issue: I went to turn on the TV yesterday, and the screen started flickering quickly. I could see the LG logo slightly, but that was it. It just continued with a quick flashing. I unplugged the TV from the outlet and let it sit without power for hours while I was at work. When I got home, I tried resetting the TV by holding down the power button on the TV for about a minute while it was unplugged. When I plugged it back in, the screen immediately continued with the quick flashing. I didn’t even push the power button, it just started happening the moment I plugged it in. Prior to this, I have not had any issues with the TV whatsoever, it has worked perfectly. I haven’t experienced any power outages, and my TV is plugged into a surge protector, so I’m not sure what caused this to happen. I’m thinking that it must be the power supply/LED driver board since the screen starts flashing as soon as it is plugged in. Has anyone seen this happen before, or possibly know what the issue might be? Any advice would be greatly appreciated. Thank you for your time. Travis King

travot3k sure, it could be the main board, the power board or worst case scenario, even the panel. I just have a hunch here. It is a LG TV and they are really having issues with bad backlight strips. A failing backlight could also appear as if the TV is tuning off and on. Disconnect the backlight LED from the power board. Measure the VDC on those connectors with the TV on. See if the voltage is stable and steady. With a TV that size I’d expect around 3-400VDC. Let us know what you find out. Of course you can also measure the voltages on the connector from the power board to the main board. Use the legend on the board as your guide about the voltages. Post some really good pictures of your board with your QUESTION so that we can see what you see. Adding images to an existing question