My Sony 35" KV model began losing its picture a few months ago. WHen first powered up, the picture was often half the screen and mostly static. Slapping, bumping, or tapping the back of it with a small hammer (honestly) would usually get the picture to normal but often for less than 30 minutes then the screen would go blank. I was using the three composite connectors (left, right, & video). I took the back cover off and cleaned the television good inside but that made no difference. I switched to using an S-video cable and the picture is working great. I tried the coax connection and got no picture.

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