Hmmm... The thing about going into open firmware is possible. What worries me is that it won't accept the reset PRAM key command anymore. It worked for one chime and then it just stopped chiming. I let go of the keys and it has displayed this problem ever since.

Click to expand...

That's annoying, but not necessarily a problem. In fact, I seem to recall that this is what caused the same problem with my 2400c. Anyway, it doesn't respond to Apple-Option-P-R anymore because it stops at the Open Firmware prompt before it loads the Apple ROM and resets the PRAM.

Try this. At the black screen after a few seconds (count to ten, I guess), type

bye

Then as quick as you can, hold down Apple-Option-P-R. Does the Mac reboot (or at least make the chime sound again after a few seconds)?

Peace,

Drew