Sony MZ-M100 doesn't read the any of my disks anymore?

I'm guessing the laser is jammed because it sounds like it's trying to move but can't. I don't want to spend the 80 bucks that Sony charges to fix it but I may have to. It's a very expensive unit and all my music is on MD. I don't want to switch over to ipod or another MP3 player because I like to record my own music. Does anyone have any advice or know how to fix such a problem? It's stuck on the opening sony logo screen and won't go any further to read the disk. Please help!