Chosen Solution

I have LG 47LN5200-UB, has been working fine but two nights ago went to turn it on and screen is black. I can see a Faint picture if I hold a flash light up to the screen. I have tried unplugging it, holding the power button for 10 seconds and plugging it back in. I tried switching picture settings to vivid. But did not help. Sound works fine. What else can I try.

It will be a tcon or backlight issue, Look for someone local to you to repair it or if you feel you have the confidence do it yourself with some help from us.

If you let it warm up a bit then the picture will eventually turn out clear.

ok so… there is a kill switch relay on the powerboard,almost the first component in the circuit. it will look like a small black or /blue , somtimes yellow rectangular box. it wiill have 6-8 pins soldering it too board. almost every time. i fix a tv that does it. of coarse. whatever diode down the line burned out allow and is allowing high volt spikes when relays flip. is still burned out thus thee relay coil will also burn out eventually. unless u add a high efficent diode between switch outlet and and un switched oulet pole. poles ——->–arrow facing toward switched. this will atlt least protect from the “main” high voltage spike. they do make relays with diode built in. but i like to build my own relays. so they work forever….. also use a heatsink between solder connection and diode or u will pop it. (make it not have direction). well love,hugs, and happy mucking.

If the screen is dark, but is visible when exposed to bright light, then the backlight may be broken. A simple comparison would be the Game Boy, which had to backlight and was notoriously difficult to use in the dark

I don’t know if this is the reason but I suffer from the same problem but I believe that the TV isn’t getting enough power from the cable you plug into the outlet I Feel That’s The Problem

Your inverter! We had the same problem!

Hi there if got a aim TV also if I hold my torch can see the picture settings I’ve done scan reset it all of that it work yesterday but when I turn it on today got little picture of i put my flash light