As some of you may recall, I won a Mac Classic II on eBay several months ago. It worked fine when I first got it. I messed around with it for a few days and then put it on a shelf on my desk. I took it down just now to start it up again, and while everything sounded good, no video came up on the screen! I waited for a few minutes, and still nothing! I'm really at a loss as to what could have happened. Any ideas?