Thanks for the information. I too ran into that link on the IBM site, but
the 500 series manual is nowhere to be found.

I can't find any obvious fuses or breakers on that PSU. It's a huge device,
but I can only see cables coming out of it.

The most obvious answer is that the power supply has blown. But there's no
evidence that that happened -- the last time I used the machine, it properly
executed its shutdown, and the computer has been disconnected since. (I
haven't had room for it in my office until this weekend, so it's been
temporarily housed somewhere else.)

And I have seen this behavior on PCs before, where the culprit wasn't the
power supply at all, but an improper connection or other hardware issue
(once it was a screw that had fallen onto the motherboard). I'm hoping that
it's something like this, because if the PSU needs replacing, I'm afraid
that the machine will be out of order indefinitely. :-(

Thanks again,
CL

"Dr. David Kirkby" <drkirkby@ntlworld.com> wrote in message
news:3F220022.2FE377AE@ntlworld.com...
> Charles Lavin wrote:
> >
> > Hi --
> >
> > I have a 7013-595 running AIX 5.1. It doesn't get used very often; the
last
> > time I used it was almost a month ago. Back then, it worked fine, and
shut
> > down without any problems.
> >
> > Today, I can't get it to switch on. I plugged it in, flipped the power
> > switch, and nothing happened. No flicker of LEDs, no display, no fans
....
> > it's as if there were no power at the wallplate.
> >
> > I checked to make sure that there was power, and I tried several power
> > cords. I even checked to make sure none of the internal connections had
come
> > loose.
> >
> > I don't have any hardware manuals for this particular machine. What
would
> > cause a 7013-595 to act so dead all of a sudden?
> >
> > Thanks,
> > CL
>
> I'd be tempted to check that the unit is not blowing the fuses in the
> mains leads. If there are any internal fuses on the psu, I would look
> at them.
>
> I'm afraid to say that electronic equipment does have a habbit of
> developing a fault when switched on or off, and less so when in use.
> It sounds very much like the power supply has developed a fault, but I
> don't know the equipment.
>
> I had a look for the service manual. At this page,
>
http://publib16.boulder.ibm.com/pser...13_jseries.htm
> devoted to the 7103 J series boxes, it mentions "For other 7013 models
> see 7013 500 Series Installation and Service Guide." You might try
> asking IBM if that manual can be found.
> --
> Dr. David Kirkby,
> Senior Research Fellow,
> Department of Medical Physics,
> University College London,
> 11-20 Capper St, London, WC1E 6JA.
> Tel: 020 7679 6408 Fax: 020 7679 6269
> Internal telephone: ext 46408
> e-mail davek@medphys.ucl.ac.uk