I am working with a Quad PowerMac G5, and it has been freezing every time I start the computer, often seconds after pressing the power button.
I have tried starting up the computer in Open Firmware mode (command option O and F) to reset the ram, but before I can start the sequence (reset-nvram...set-defaults...etc.) the computer freezes.
I have also tried to reset the PRAM, but the computer only resets again and then freezes.
Finally, I have tried to boot Tiger with the intention of running repair/disk permissions, but, once again, it freezes before I can start the process.
Any suggestions would be appreciated! Thank you