-----Original Message-----
 From: cctalk [mailto:cctalk-bounces at 
classiccmp.org] On Behalf Of Peter
 Coghlan
 Sent: 15 October 2015 23:47
 To: General Discussion: On-Topic and Off-Topic Posts
 Subject: Re: Opening a DECserver 90M External PSU
 Back in April, I wrote:
 > Robert Jarratt wrote:
 > >
 > > One of my DECserver 90M PSUs got dropped and stopped working as a
 > > result, possibly because it got pulled by the cable. That sounds
 > > like the kind of damage that might be repairable. I tried to open
 > > the enclosure and I found a hole under one of the labels, expecting it 
to
be
  a screw hole, but it isn't.
 > > I am guessing you just have to pry the halves apart, but without
 > > knowing where the clips are inside it is easy just to break the thing.
 > >
 > >
 > >
 > > Does anyone know how you open these PSUs?
 > >
 >
 > As far as I recall, there are no clips - it is glued all the way around.
 >
 > Mine (actaully a 90TL, with H7082-AB PSU) failed too.  Using a lot of
 > patience, I pried it open without too much damage, fixed it (a
 > capacitor in the startup circuit IIRC) and glued it back together.
 > The end result was only slightly rough looking and would probably have 
been
  better with a more suitable glue.
  The thing has a very Lego-like quality about it.
 It failed again some time later and I haven't had the enthusiasm to
 break it open again since.
 
 I finally worked up the enthusiasm.  It was easy to open this time as the 
glue I
  used to put it back together last time was not so
good.  While I was 
measuring
  voltages on the input side, out of the corner of my
eye I noticed the LEDs 
on the
  front of the terminal server lighting up briefly.  I
found that I could 
get them to
  light up consistently by pressing a meter probe on one
of the legs of the
 chopper transformer and after deploying the magnifying glass, I found a 
tiny
  crack in the print leading to it.
 That was a lot easier than I thought it was going to be.  I hope it lasts 
a bit
  longer this time though.
 Now I find that the privileged password is not what I thought it is...
 Regards,
 Peter Coghlan. 
I tried to pry mine open, but it seemed that if I kept going I would end up
damaging it more than I would like. Do you have a picture of the opened
casing I could see? That would help me to see how best to open it.
Thanks
Rob