Offhand:

This machine will no display video if the RAM is not properly seated. 
The machine uses system RAM for video. If the driver for the video card 
from the Power Computing clone was not present, I don't think it would 
work, either.

I got one on eBay that arrived with processor and RAM loose and thought 
it was dead. You might try resetting the CUDA switch. It's a small (I 
think black on this machine) button on the motherboard. It's located 
somewhere around the PCI slot (I think if I recall behind them). Press 
the button and hold it down for 30 seconds or so. Alternavitely you 
could try booting the machine and holding down the cmd-opt-"r"-"p"to zap 
the parameter RAM from the keyboard. I had an S900 that I had to do 
wthat with.

Gary

John Impellizzeri wrote:
>  Reseated the cache card, the CPU and the lone RAM DIMM and now at power up
> it chimes and I hear the hard drive spin up.  But there is no video and I
> don't hear any other drive activity that indicates it might be booting.
> Tried it without the RAM DIMM and cache card with the same results.  I tried
> a known good video card from a Power Computing clone in one of the PCI slots
> and get no video from that either.


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