Picture fades away but still have sound
Watching TV for couple hours and then the picture fades away, turn the tv off and on the picture returns for awhile and fades away in about 15 minutes
@exideguy sounds like some bad caps or transistor on the power board. Open up your TV and take a look at the boards. Look for bulging, domed or leaking components. Post some images of your board with your question. For that use this guide It'll allow us to see what you see. At this time I would probably consider changing the power board.