[weblacky]

Hi,
FYI the "CPU0" label is generic to express the "running system" vs L1...it's not literally a CPU error. I've seen this before when the PROM doesn't boot for some reason or PROM output has been redirected. Your PIMM voltages look good, so I doubt it's literally the PIMM. It's the POST/BOOT processing stalling out. It calls the PROM output screen that is supposed to be there "001a01 CPU0" on all Fuels...when the PROM is just not running when expected.

Did the Front case LED change behavior?

There is no PROM until stage 2 startup, though running fans should only occur on stage two. Try the "reset button" idea I mentioned. Also try putting the serial cable for the PROM output on both external serial ports in case there is some form of output

I can tell you concretely that on problem Fuel mainboard I'm working on... PROM almost NEVER appears on the L1 connector using the Crt+t/d commands. It's always either hiding entirely or on one of the another external serial ports. On some I still haven't found it but luckily got past my issue into the graphical PROM by using reset button restarts in the cases of stopping due to snaphat battery failure and NVRAM reloads.

Refer to threads like this: https://gainos.org/~elf/sgi/nekonomicon/...hnK/1.html

Same "error" you are getting yet it's only because the PROM output had been redirected! I swear the VAST majority of the Fuel mainboards I see don't have L1 PROM output. Also PROM output is very tricky, you MUST have the terminal software open and "off hook" BEFORE you turn on the fuel or often the Fuel doesn't see it had a terminal hooked and doesn't output anything for PROM serial output...happens so often to me I nearly pull my hair out about PROM issues where i cannot get the terminal "up".