This is a long shot (and I know nothings about this particular piece of equiptment), but here goes: I have an Agilent N5030A which was not booting.? I changed the battery on the mother board (and again not booting).? But there was a "switch" on the PCB (i.e. two pins on the PCB) next to the backup battery which one had to short out (labeled "reset").? This forced the card to boot from the RAM rather than the hard disk drive and allowed it to start up fresh after the said battery change.? Perhaps there is a backup battery on the CPU board that you could remove, replace, and a similar switch which one could short to force it to boot up and reset in this manner???? Total long-shot, so please ignore if not helpful.
