Following on from my "Kernel panic" thread, the same machine had another around an our ago (now using another iMac to post this). Except now when the system starts I get a "PPP interface <blah blah> is not connected" - because I have the modem plugged in here now to post this. After that message is okay'ed, I get my desktop picture and NOTHING at all on it. The computer still goes into sleep mode ok. I just tried a safe boot (by holding in shift key on power on) to no avail. I reinstalled OS X Tiger, using archive and install - still boots up the same way. Something has seriously gone wrong with this machine, which was working perfectly well under Panther for a couple of weeks (which was when I just bought it second hand). Any assistance or ideas would be greatly appreciated. I have documents and a 6GB iTunes collection on there I'd wish to keep hold of.