I have had an iMac G5 Rev B for over a year now, have applied for Apple Care but haven't heard back from Apple yet. It has had its logic board replaced twice so far and has been in to Apple 3 times. Now the optical drive is giving me problems, it is spitting discs out so that they fall out, damaging my discs. Also it seems to struggle to read discs. It couldnt not read my UT2004, which my iBook can, but after trying again it reads it fine. My sister says she has had also had problems with some of her music CDs. Is the optical drive in my iMac easy to replace? Or will the whole iMac (fingers crossed) need to be replaced?