I would probably just buy a new motherboard. But, I see that it's an expensive high end MB. Your problem could be that sugar makes a good conductor of electricity and it could be shorting out the MB. I would start by removing the memory cards and checking them for Coke. While the memory is out, you can start the PC - it should give you the missing memory beeps. You might the try detaching and reattaching all the power connectors to the motherboard.