Trying new transformer, other consoles say "System OK" but one says "Status: 666"

[leeleses]

System kept crashing, so trying new transformer.

Trying new transformer, other consoles say "System OK" but one says "Status: 666"

Has anyone seen this or similar displayed on a keypad before?

Does anyone have a 33A00 pdf manual?

See also --Omni IIe panel locking up every few months lately.