My friends vcr pooped out on her last week, or so we thought. It rewinds, forwards, etc. Plays, but no picture...just sound. All you get is a blue screen. Thought it was bad so we got one from somebody else which I tried on my tv before trying it on hers. Basically it's just being used to watch tv programs that I have taped for her. She'd get through one episode and then it would go to the blank screen again. She'd stop it, take the tape out, put it back in, then play and it'd be fine again. Any idea what would cause this??? (Aside from her apartment being posessed) Please help. I don't know model info, but can find it out if need be.