Booting up a Power Mac G5

On Bootup I get this over and over and over again in open firmware window.
Illegal instruction at %SRR0: 00000000.0000000 %SRR1:1000000.0208b030
Any ideas?

Something interesting. If I unplug the Apple Keyboard from the USB port it just boots to a grey screen. I've tried the front and back ports same thing happens.
Reseating/Trying different RAM didn't help either.
I've zapped the PRAM .. reset the PMU .. and also booted to open firmware and did the reset-nvram and reset-all.
Message was edited by: Jonathan_Monahan

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