The Apple store had it fixed within hours of my dropping it off, and I picked it up tonight. It seems to be working fine now. I am happy that I asked to also have the RAM upgraded to 2 GB, as it is noticeably faster now. However, the Backup refuses to restore, still, so my iTunes library is history. I will try Apple support by phone on this tomorrow. On other things I had plain old backups I made with straight copying to external drives, so I think I have most of what I need back into my Documents folder.