We have an iMac G4 (1 GHz 768MB RAM; 80 GB Harddisk; 17TFT) and a Power Mac G4 (M5183, 400MHz 256MB RAM;80 GB Harddisk) both are running with Mac OS X 10.3.9.
Both macs cannot be properly started from time to time. Per example after a restart the mac starts fan / harddisk etc. but the...