I have a Power Macintosh 9500 that worked fine up until yesterday. I no longer get a boot chime, but the computer still functions and boots. I checked all cables, PCI cards, and the processor card. All are seated properly. However, It will randomly lock up, or fail to initialize ADB at boot. I'm wondering, since these machines are nearing 15 years, is it about time for the caps to start leaking? Could it be a cap-related problem?