After much troubleshooting and a new PSU, it's looking like I have a bad motherboard. My CPU tray is already flashed from 4,1 to 5,1, so if I buy a 4,1 backplane board is it going to work? Would I be able to run the firmware tool again, so that the backplane board can be flashed? I was under the impression that the firmware tool changes the EFI of both the backplane and CPU tray. If that's the case, then I will have a conflict, as one is flashed and one is not.