I just bought a socket 939 AMD X2 4800 & before I installed it I updated the BIOS with the ASrock BIOS installer. The system worked fine with my old 3200 cpu. So i put in the new cpu and it stalls at the initial BIOS screen although it reports the CPU correctly. I cleared the Cmos to no avail & checked cables & fans. The hard drive seems to start up briefly & then stop. I have a 430w Jeantech PSU Any ideas?