Disk won't play...it just keeps 'loading'

It sounds to me as if the laser isn't reading the disc. You can try a commercial lens cleaner, or you can do a better job by doing it by hand, but it means taking the machine apart. If you think you'd like to try to do this, get back to me and I'll give you all the instructions. It isn't too hard to do, and will do a much better job than the commercial lens cleaners. But the lens cleaner is OK if you aren't game. You may have to use it several times though.