I'm trying to fix my friend's iMac8,1. It kernel panics (Please restart your computer) upon normal boot from the hard drive. I tried booting from the OSX cd and it also panics. I've tried the Apple Hardware Tool at boot and it complete the short and long test with no problems found. I've tried resetting the PROM and SMC of the machine. I ran Memtest86+ and it didn't detect any RAM problems. The machine has 2 stick of RAM. I've tried booting with each stick individually and still I have the same issue. I tried booting into single user mode and it took a lot longer to boot than it did for all the other tries, but eventually that KP'd as well. Booting into verbose mode seems to hang at NTPDate. Also, I tried booting the machine with the hard drive unplugged (no power or SATA cable), and I got the same KP.
What can I try next? I'm not an Apple user (with the exception of some OSX86 occasionally) and have never owned a Mac, so I'm not familiar with what to test next hardware-wise. It would seem to me that there's a problem with the logic board. How would I go about testing that? On a PC I'm not really sure how I would test that unless I had a replacement RAM, CPU and graphcis card, and I definitely don't have any of those for this Mac.
Any help would be appreciated!
What can I try next? I'm not an Apple user (with the exception of some OSX86 occasionally) and have never owned a Mac, so I'm not familiar with what to test next hardware-wise. It would seem to me that there's a problem with the logic board. How would I go about testing that? On a PC I'm not really sure how I would test that unless I had a replacement RAM, CPU and graphcis card, and I definitely don't have any of those for this Mac.
Any help would be appreciated!