Check to make sure everything is seated, and swap out RAM if you can. The ROM tone is a sign the board should work, but you never know. Post up as much info on your troubleshooting so we can figure out whats going on with it.
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MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop