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I've got an old Dell Dimension 8400 that's occasionally getting this error:

I\O card parity interrupt at C000:2100
Type (S)hut off NMI, (R)eboot, other keys to continue

The keyboard don't work so I have to force shutdown to reboot it.

Sometimes it does it again immediately after I reboot, sometimes it doesn't.

This seems to happen before POST, so i'm guessing a part is failing. How can I figure out which part?

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What is your motherboard model? – Dave Jan 7 '13 at 14:56
@DaveRook According to CPU-Z it's by Dell Inc. Model # is 0U7077 – Josh Jan 7 '13 at 15:00
up vote 0 down vote accepted

This error has to do with an expansion card of some sort. If there are any expansion cards (video, USB, sound, etc.) installed, remove them one at a time to see if the error goes away.

If there are no expansion cards installed, or you've removed them all and still get the error, it is likely a motherboard problem.

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