Problem solved: As I had the machine configured as a dual boot system prior to installing the new mobo, I needed to have BOTH hard drives in place before the system would boot. I had the hdd with win7 online but I had the old hdd with winxp temporarily hooked up to my laptop so I could get access to important data. I discovered I had to have the hdd with WINXP online before the system would boot into WIN7. I just reinstalled the old hdd on a hunch, I was about to give up. To complicate matters, the cd drive seems to have been offline. System now running win7 although am still having problems with winxp.