My Powerbook G4 has crashed while nothing than a screensaver was running - I got a "X mon" exception message, sorry but I do not wrote it down.
There may be was some NFS traffic, I noticed the not responding system, as I tried to unmount a NFS resource, I worked with before. I'm running Debian-Linux (Woody), Kernel 2.4.17 Ben The system was running well for several month before... I tried to restart with the three Buttons (Option+Ctrl+Power), as it always has helped in some worse situations -- but nothing happenes :-( The only way to shut down was the reset button, which I never used before. Then the bad surprise: Switching on, the hard drive spins up, but that was all: -no startup chime -the display stays dark -only the caps lock and num lock leds are working The Power-Command-Option-P-R or -O-F has no effect too. A CD boot does not work, because it does not load a CD while running or powered on with Power-C. Switching off is only possible using the reset button again or holding the Power Button for about 4sec. Any helping ideas, or how to find out if the mainboard/CPU is bad? (I've still the 1 year warranty until 3/2002) Percy

