We have a 43P-260 that crashed during power brownouts and now doesn't get
very far at all in the boot process. It pauses for a long time at
checkpoint E298 or E297 on the LEDs, then stops with code 40A00000.
The service manuals list this as a firmware IPL failure. I've tried
downloading a new firmware image onto floppy and installing it through
the Service Processor menus (on a terminal on the TTY port - at least
that part still works), but it gets to the same point and stops, without
(apparently) reading anything off the floppy. The last visible sign
of activity before failure is that the floppy drive activates, but the light
stays on forever.
If anyone has seen similar behaviour I'd love to hear about it - even better if
you figured out how to fix it!.
Richard Brittain, Kiewit Computing Services, 6224 Baker/Berry Library
Dartmouth College, Hanover NH 03755