Re: Power supplies keep crapping out on me
- From: grent@xxxxxxxxxxx
- Date: 10 Aug 2006 10:33:12 -0700
Hi,
It might jist be the off/on switch just went bad. Not sure if the
IIes PS had any kind of fuse in them.
If you need a few P.S. drop me an email. Tying to send a Email from
the via the way the google groups you can not remove any thing from the
email address.
TaKe Care
Scott Alfter wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
For the past couple of years, I've been running one of my spare Apple IIs
24/7 as a temperature controller. Given that people (including me) used to
run them as BBSes back in the day, I wouldn't think this would be a problem.
However, I've now had three power supplies fail on me. It's used to switch
the compressor of a refrigerator on/off, which I use to keep fermenting beer
at the proper temperature.
If I don't have a beer fermenting, I'd ordinarily switch the computer off.
It should fire right back up when I want it. After the first two failures,
I decided to keep it running all the time, setting the temperature above
room temperature when it wasn't in use (so the compressor would never kick
in).
The most recent failure was sometime last week. I briefly considered
shutting the computer off during a particularly nasty storm that hit Las
Vegas Monday evening. A nearby lightning strike must've induced a surge in
the cable to the temperature sensor, causing it to lock up and return
invalid data. (A similar surge must also have been induced into the HVAC
wiring, where it zapped the settings in the thermostat. It's worked
properly since then, once I reprogrammed it.) Turning the computer off for a
few seconds and turning it back on worked OK, but then I decided to just
turn it off and leave it off.
When I went to switch it back on a few days later, though, it wouldn't power
up.
I have it on a UPS, so it should be protected from "power nasties."
Previous failures haven't occurred near storms, so I don't think last week's
storm had anything to do with the failure. (All of the other computers I
have are still running.) The power supply that failed this time, IIRC, is
one in which I drilled a bunch of holes in the side for extra cooling maybe
15-16 years ago, and other than a RamWorks II, this particular IIe doesn't
have anything particularly power-hungry in it.
The last time I popped one of the failed supplies open, I didn't see
anything obviously wrong. No capacitors had blown open, and it didn't look
like any other parts had let their "magic smoke" out. I suppose that
20+-year-old electronics could now be getting to the point where it'll fail
more often, but is there some fairly common failure mode that I can check to
see if I can get these power supplies working again? I could hack in a
microATX power supply (my "stealth GS" runs one of these now) or pick up one
of the GSE-Reactive supplies, but if I can get the original power supplies
working again, I'd think that'd be better from a standpoint of keeping the
machine closer to stock condition.
_/_
/ v \ Scott Alfter (remove the obvious to send mail)
(IIGS( http://alfter.us/ Top-posting!
\_^_/ rm -rf /bin/laden >What's the most annoying thing on Usenet?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)
iD8DBQFExP3IVgTKos01OwkRAt5nAJ41cG/4uGWemRmu85ocDMzzebA9lQCfcraD
sxU1G8Iw8o8fS12jO2FYxZw=
=OQ++
-----END PGP SIGNATURE-----
.
- Follow-Ups:
- Re: Power supplies keep crapping out on me
- From: Bill Garber
- Re: Power supplies keep crapping out on me
- References:
- Power supplies keep crapping out on me
- From: Scott Alfter
- Power supplies keep crapping out on me
- Prev by Date: Re: A2 on eBay
- Next by Date: Re: A2 on eBay
- Previous by thread: Re: Power supplies keep crapping out on me
- Next by thread: Re: Power supplies keep crapping out on me
- Index(es):
Relevant Pages
|
