Hard drive works fine, recording and playing. The disc drive won't play or record anyghing. It started having on and off problems playing rental discs. That got worse. Then it started having problems playing self recorded discs. Now it won't play or record anything. I put a disc in and it shows "loading". It doesn't seem to start spinning. It makes some consistent noises like "irrr Irrr, Irrr Irrr. After about 45 seconds, it ejects. Any suggestions. Tom