RE: Precision T7500 strange Pb7 message
Have all my suggestions been done with new or old motherboard? Did you double-check to see if you still get pb7, no matter what you try?
pb7 is "BIOS not execution". Surprising you'd get same code if you changed the mobo. Do you know the new mobo is good, even if it boots with only 1 CPU?
What if you use the bare minimum amount of RAM to populate the mobo and riser, but still using a supported RAM config?
You replaced mobo, riser and PSU, removed PCI-e cards and disconnected non-boot hard drives. So that probably only leaves the boot hard drive, video card, and front panel circuit board, assuming the new board is ok.
Running out of other ideas...
Forum Member since 2004
I am not a Dell employee