Don't know, maybe this manual could help you. I had a similar problem.It started out of nowhere, with some sort of glitch... the picture would flicker and make a noise as that of interference... sometimes it would go back to normal, and some other times it just went black, but the sound was still there. I had to turn off the TV and back on to get the picture back. After having done some research on the net, I found that there was an easy way to check if the source of the problem was faulty inverters: I turned off the lights in the room and checked the screen with a flashlight at an angle... bam, the images were there, so I'm guessing there's a faulty inverter, or maybe both of them.