How can I repair JVC AV-32920?

Loses video intermittently, sometimes flashing back and forth between the blue noise muting screen. Sometimes, changes colors. Other times has a strange line roll down the screen where the image shifts to one side within the line. Major problem is the flashing from normal video to blue screen. Goes for days without a problem and then will act up at random times for random durations. Symptoms appear to be worsening over time, first appearance was a few months ago and now the problem appears almost daily. Acts the same way on S-video out and RCA out. I haven't checked the coax out.

I have some computer monitor repair experience and to me this seems like a bad soldier joint. I am competent with a soldering iron and have the necessary equipment. Though, I haven't a clue where the soldier points in question would be.

Any advise is greatly appreciated.