I inherited a faulty iMac G5 from a family member. The "You need to restart your computer" forced dialog appears every now and then upon boot up or during disk accesses. It has 2Gb of RAM and the two DIMMs checked out OK with memtest, but only when run individually in slot 0. For some reason, both memory DIMMs installed together appear to increase the occurrence of faults. It does show signs of early capacitor leakage. A few of them have a dollop of beige powder in the center. None of them are swelling yet, though. The hard drive is functional enough to serve as a slave, so all valuable data was copied from it. However, disk utility tests continue to crash at various points of testing out the hard drive. "fcsk -fy" found errors and couldn't repair them. I did a fresh "erase and install" of OSX 10.5, which went fine up to the 2nd disc, until it failed at the very end. The computer could still boot up OK, but when running the disk utility to check on things, the computer locked up again. Running the install once more only got through the 1st disc... very strange behavior. So, it looks to me like all this computer needs in the short run is a new hard drive, then later on a replacement of the capacitors. Any other things to keep in mind on troubleshooting faulty G5's? Could there be other factors contributing to the unstable function of this G5? If so, please let me know what diagnostics or checks I can run to narrow down the problem(s). Thanks!