I just managed to boot with command S V (verbose?) and the system hangs but shows my lots of errors. They are mainly around:
Why is my power mac trying to do something with Intel CPU. I am unable to boot from the DVD now and so cannot enter the terminal to enter:
rm -rf /Volumes/"Your Leopard Partition No Quotes"/System/Library/Extensions/AppleIntelCPUPowerManagement.kext
(I found this on another site).
Thanks for any help.
After another day of trying, still could not get it to boot.
Other things that I tried (found via internet searches)
1) went into the firmware and reset the nr-ram (?) - OK, but reset-all caused the system to hang
2) swapped over the ram sticks
3) reseated the video card
4) left the macine unplugged and the PRAM battery out over night
5) boot with cmd s now hangs at "DART enabled" for hard drive and install DVD (grey install disc, tiger retail disc or leopard retail disc)
6) using a firewire cable to my other mac, I can boot in target mode (press T after the chime) and access the drives, copy data etc. [this feels very odd, almost like an autopsy - the mac is dead but I can poke around in the files]
@ nothappyxxx, you can try all these.
Now the G5 always boots to the grey apple screen without a spinning gear. From all my research, it appears that either the mother board or the power supply is broken.
However, the apple hard ware test (AHD) ran (from original installation discs) and said that everything passed.
Anyone have any final thought before I mod the G5 into a NAS?