The workstation was running smoothly until I rebooted it and stopped working.
When I turn on the computer, it doesn't show anything on the screen (I tried to plug the monitor both to the Graphic card and directly to the Motherboard), I can't even access Bios. I tried resetting the CMOS battery of the mb but didn't help. Also tried to remove the ram bank and turn it on but still no luck.
I suspect the motherboard is broken.
In the HP part store I can't find the same mb model I have on the workstation (655581-001), but I found this one:
655842-001 - System board (motherboard) printed circuit assembly (PCA) - For Convertible Minitower (CMT) Workstation
Are the two motherboards interchangeable?