Could be the power supply or cpu. Newegg has a socket 754 ecs combo for $49.99 with $10 rebate last time I checked. It will work with your ddr memory, if you believe it's still good. I go for fry's combo specials if you live near one. They have an ecs board with athlon 1620LE single core cpu for $69.99 this week. ddr2 is cheap. 2 gigs is about $20.