Spilled coke into computer:working out what still works

Long story short, I have the coolermaster case with an opening at the top for USB ports. I knocked a can over and watched the liquid travel through the hole in slow motion..a few seconds later the computer died (funny that)

I left it a week to dry out, but hitting the power button does nothing with the graphic card inserted. If i take it out, it doesn't short out, and its possible to hear the hard drives spinning up. This makes sense as the opening for the ports is above the huge 8800 card, and was bound to be splashed.

Basically, I'd like to know whether I need to replace the CPU? I'm ordering a new video card obviously, and a new motherboard in case something in it is fried which only shorts when a card is inserted.

Does the fact that the hard drives are doing anything at all mean the CPU is alright? If it's not, and I place it in the new motherboard, could it damage the new one aswell?

Thanks for any help