27 Feb
2000
27 Feb
'00
4:55 a.m.
Jay,
Do all of those machines use the same power supply? I know where there
is a HP 12797 (or 12979?). It's an I/O extender for the HP 1000. It looks
like it has the same card rack and power supply as a 1000. I can probably
get it cheap if you need it. It has a DCPC card in it but all the other
cards look like interface cards for external IO.
Joe
At 10:28 AM 2/27/00 -0600, you wrote:
One of my 2100's has developed a problem. It was
working fine for some time,
but was only powered up occasionally. The problem started when I ran some
burn-in diags over several days. The machine started acting funny, and when
I powered it off and back on, there's no front panel display at all - no
lights. However, all the fans come up, one of the internal boards that has
an on-board led is lit, and I checked all the outputs of the power supply
and they're just peachy. I moved every single card (including the front
panel) from the bad system to another system and it then runs fine so I know
it's not any cards. I suspect the power supply, but as I said all the
outputs appear good. Gawd I hope nothing happened to that wire-wrap
backplane.
Can anyone offer some advice? I'm starting to pour over the schematics on
the power supply - wondering if something is amis with the poweron or
powergood signal perhaps but I don't know much about it.
Any tips most appreciated!
Jay West