I am at work and I have 5 Supermicro H8DG6-F motherbaords that wont POST. It has 2 Opteron 6220 CPUs. It has 128 GB of ram. These are the things I have done with no success. Tried 1 CPU, taken all the ram out (no memory post beep when I do this), rest the BIOS, taken out the battery also to clear CMOS. Tried 3 different power supplies. Tried 1 stick of ram. So far nothing. Supermicro says they have no ideas. Any help would be great.
Do you have any 6100 series CPU's laying around to test? My thought is that the board's are not flashed with the latest bios that supports 6200 series.