Screen is black, But sound still present.What to do?

"ctruman72,

I don't know which model you have but if you hold a flashlight to the screen do you see movement and images? If you do the backlight has failed. If you do not see images you may have a main control board problem. Did the service tech tell you which board? You may find the board on the internet. Use the tv make and model along with the board part number with a google search."

"More than likely you have 1 or more LED's that are shorted out. When this happens the LED strip will draw too many amps and the board will shut down all LED lights as an over-amp precaution. This happened to my 50"" LG and I was able to fix it at no cost by removing that particular LED strip from the circuit. It is not a difficult repair, but does require someone to pretty much completely disassemble the TV. If you want to attempt the repair, here is a Youtube video that provides some instructions,

https://www.youtube.com/watch?v=YgaL6X6e...

You can replace the strip that is bad for about $50 or just remove it from the circuit. If you just have one bad strip, you probably won't notice any change in picture quality after it is removed. Be careful if you disassemble the TV. Even if it is unplugged it will still have capacitors that carry a high charge of voltage."

Had a 42 “ LG and after about 18 months screen would go black but sound was still on , rang LG but wouldn’t do anything as it was out of warranty. After 5 years of messing around with it (turning it off and on ) decided to buy a 50” Panasonic which is brilliant ,in the meantime I thought I would take the back off the LG and give it a good clean and push all the connections on securely and tighten all screws ( some of which were quite loose ) we now have the LG on the kitchen wall and it has not gone off at all and that’s after 1 week , it worked for me maybe it could work for you ,good luck

"Press volume down key and power button together simultaneously switch OFF main plug and then put it ON again

That's it your TV is on.

I did this with my TV and seriously it works."

"Well not sure of this will work for every one but my lg t.v just went black when my son turned it on to play x box. I looked online every one was saying buy some chip. I just unplugged the power cord from my t.v and plugged it back in and it turned right on.

Think smarter not harder"