Hi all, I just received a 20" imac G4 that I had been after for a while and have recently bought on ebay. Its a fantastic machine! Love it! It suits all my needs as a back up computer. However, I am having a single minor problem with it, and its not a usual one. The seller said that he had installed a blu ray burner in it as a replacement to a superdrive (i assume the superdrive broke). It didn't effect the price of the machine, and he claimed it still burnt dvd's and cd's. I have received it and it plays dvd fine. Not used any blu ray on it (and probably won't as i know they won't work on a mac anyway. May try and burn one one day though). However, it will not read CD's at all. It takes them in, doesn't seem to even spin them up (or if it does, it does it very quietly) and just stays in their. I can eject them again fine. It just doesn't read them. I haven't contacted the seller yet. I thought I would ask on here first. One thing I feel I should mention is that (after booting it for the first time and giving it hardware diag to make sure it works) I have already opened it up to replace a PRAM battery (this was in ebay description). I am hoping I haven't affected the drive when I disconnected it doing this. I also don't really want to open it back up again to reconnect it as I have to re-apply thermal paste to the heat sink every time I do this. Would a disk cleaning disk work ok on a BD-R drive? Any help would be great thanks. And oh, sorry if this is in the wrong forum. I didn't know wether to place it in the powerpc one or somewhere else due to the weird nature of it.