I ran my meter across all of them and I'm getting the same voltages you
did.
Any other ideas on what could be this beastie's problem? Its looking
more an more like something I'm not going to be able to work around.
As I mentioned before, I had a lot of trouble with the edge connector
that the CPU slots into. I think the machine has been in a damp atmosphere
and suffered from corrosion. I ended up cleaning it and reseating the card
several times before it worked right. There were all sorts of varied symptoms
including doing nothing.
I also had a B-Cache failure but as far as I recall, that resulted in
large numbers of error messages during the self tests. As the B-Cache can
be disabled (or tested I think) by just moving jumpers, it may be worth
trying that, just in case.
I'd be happy to take measurements from mine for comparison purposes but
without schematics, it is difficult to know what would be useful to measure
other than the power supply lines which we've already covered.
Regards,
Peter Coghlan.