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.
MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop