Years ago I bought a Magnavox CDB-473 but stopped using it when it seemed like the laser was going bad, replacing it with a somewhat inferior (but cheaper) Philips 920. Recently I got it out of the basement and on a whim fired it up. It seemed to play flawlessly. The only problem was a squealing noise when powered on. I removed the cover and noticed that when turned on with a disc in it, the disc would move a little and stop, there would be a squeal, then the disk would start spinning again then stop after the disc info was read. There's a power-on squeal with or without a disc. As I am a newby to all of this, I would appreciate some ideas as to what to check out before I disassemble it and then realize that I have no idea what I'm doing.