[WillumpieNL]

After years (decades even) of drooling over cool SGI (and other "exotic" Unix hardware) equipment I lately decided to go for it and buy an O2 for cheap. It included a 1600SW display and original keyboard so it was quite a good deal. The owner didn't know what kind of O2 it was, but it turned out to be a 400mhz R12K with 1GB of RAM so that was a nice bonus as well. Only problem is: it wouldnt boot. But I saw that as a nice challenge anyway, kind of naive.

But the probleem seems kind of hard to diagnose right now. The machine instantly powers on when I plug in the power cord. After that I either get:
- red LED
- solid amber LED
- blinking amber LED
- green LED, no start-up chime
- green LED, start-up chime, blank display (but DOES sync)

The further down the list you go, the less I have seen it. Mostly red and amber LED's. What I have tried:
- remove all RAM and insert various combinations of 2
- reseated AND cleaned all components
- replaced PSU

No luck so far. I have also raised my question at the Discord channel where some said it is most likely a malfunctioning mainboard. Seemed quite plausible to me so I started earching for a replacement but that is harder than I thought. I can't find anyone (local) that has a spare R10K mainboard. But now I'm starting to question myself: might it be something else?  :huh:

I have, of course, read the manual and the troubleshooting diagram, so I know what the LED codes mean. But the fact that the errors aren't constant it makes me wonder what it could be.