Well I have a major problem trying to decide if its a motherboard or cpu .When I start up my computer and the only thing that works is the cpu fan ,The hard drive don't spin seems like its not getting power the cd rom won't open or the light won't turn on.I have a new power supply cause I thought that was the problem but I was wrong .I check the memory and they are fine ? Plus I get a blank screen ? I have a ASUS a7s333 2.0ghz 1gb memory (pc2100) 80g hd Winsxp~32video,nic 10/100