With DDR2 installed it's a newer model board. The advise often given when seeing initial problems is to update the bios with the latest version available. Sometimes information is lost in the bios programming. Bad ram will usually set off an audio alert with a series of beeps heard when first powering up.
Often these errors can be seen when there is a driver clash or hardware incompatibility problem to resolve. One software offers a free tryout for some many days to identify any specific problems found. The program is found at a good site for updates as well as freewares and sharewares. ErrorExpert does seem to receive high ratings and can be downloaded at
http://www.errorexpert.com/download.html