People have been talked through some tricky procedures
on this
list ... For that matter this is maybe the 3rd VAX-11/750 with
the "REG FAIL" fault and I don't recall ever hearing of one
getting fixed. Someone has to be the first :-)
Unforutnately (?) I've always kept well clear of the 11/750. I really
wouldn't want to maitain that CPU....
But I can be eaily persuaded to look at the PSU schematics sometime and
see if I spot anything obvious. Or at least tlak you through the design
(which might be somewhat unconventional if other DEC supplies are
anything to go by [1])
[1] This might not be a problem for you. If oyu don't have any experience
of SMPSUs, any one is as good/bad as another to get started with. The
problems generally come if you have fixed ideas ofg how supplies should
work and then you get something strange thrown at you.
-tony