Hello fellow #retrocomputing enthusiasts. Do I happen to be connected to anyone who knows about an #IBM #RS6k 43P-150?

Mine is dead as a door nail. When booting I get "Unexpected Firmware Error:
DEFAULT CATCH!, code=fff00200 at %SRR0: 00c194d8 %SRR1: 00083030"

And the debug LCD reads E1DC.

If I take out the PCI riser it boots to the RS/6000 boot menu and everything works. Got a replacement riser, but then the system doesn't even get to the 0> prompt, the debug LCD just reads 888