My parents 4+ year old first-gen G4 iMac just died rather abruptly. After some basic testing, the hard drive is fine--I can (and did) get data off of it when running in target disk mode. All the other firmware stuff seems to run ok, too--I can get into OF and do resets, and the boot selector is working. ...but as soon as I try to start up from absolutely anything, Kernel panic. Never even gets past the grey apple. Tried the internal drive, an AppleCare TechTool CD, a Tiger DVD, and even the Tiger disc in an exteral Firewire drive--all start to boot, then KP. The panics actually cough up text, and the first line of the panic looks like it says "no driver for PowerMac 4,2" (though it scrolls by pretty fast), which makes it sound to me like either the processor is dying/dead, or there's something seriously wrong with the motherboard (though no so wrong that OF doesn't work, and it can still communicate with the USB and FireWire ports and the ATA bus that the hard drive is on well enough. It's a very crusty computer (I have NEVER seen a keyboard that ugly, and they don't even smoke), so I'm not sure it's worth the expense of having a pro fix it, but I'm wondering if anybody's seen a similar failure or have any suggestions other than the obvious. Since if it's getting recycled/ebayed anyway, I might as well goof around with it while I've got it cracked open to pull the drives--they're both good, and I installed a brand new optical a year or two ago.