Well, my 4 year old twins were feuding and rapidly turning our Sony
KV-27TS29 on and off. The unit still powers and has sound, but the
picture is now just horizontal jagged lines. I tried signals in both
the coax jack and line-in and the picture is the same in both. I'm
handy enough with a soldering iron that I could swap out a few parts
if given some guidance. Any thoughts on what compenet(s) might have
gone bad?

Thanks,
Bob