Hi everybody, My 8600/350, mach 5, OS 8.6, which has given no trouble for over a year, has been booting with a bomb and saying illegal instruction, on an intermittent basis. I am a retired electronic service person and have eliminated most parts. The problem occures very early in the boot, the OS logo appears with gray screen and before the screen turns green and extensions load, the bomb appears. After this failure,I am able to get a boot if I shut down, ( ctl/command/pwr ) and hit " power" on box.,then reset pram and allow to boot. Tests have shown memory, mobo, HD's, Power supply, OS and ext's are not at fault. Could I have a flakey Pram? If so, can it be replaced ? Thanks in advance Wm.
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