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From: rhood@pro-gsplus.cts.com (Robert Hood)
Newsgroups: comp.sys.apple2
Subject: Re: My GS is DEAD!
Message-ID: <2203@crash.cts.com>
Date: 13 Apr 90 06:16:05 GMT
Sender: root@crash.cts.com
Lines: 35

In-Reply-To: message from WAXMONRW@SNYBUFVA.BITNET

Okay, here's what I suggest you do to see if your power supply's bad:
 
1. Find the +5v and Common lines coming out of your power supply.  Using a
voltmeter, see if any current is indeed coming out of your power supply. 
(Note: if you have no voltmeter, a light bulb and fixture will do the job.  If
you really need details, just ask and I'll tell you how to put it together.) 
If your power supply IS sending current, there's a short somewhere and you can
use the voltmeter to determine where.  You may need to get a new motherboard
if there is a short, but it may be something you can replace with a bit of
solder to repair a break.  (NEVER do something like add that bit of solder
unless you're POSITIVE that's the problem and the right way to fix it,
though....)  If there's no power coming from your supply, AE probably sells a
GS heavy-duty power supply much like the one they made for the //e.
 
2. If your motherboard seems to be bad, take it to Apple and have them check
it out.  If they come to the same conclusion you did, you've probably saved
some labor charges at least.  If not, well, nothing lost, right?
 
I might as well give you the details on that "light-bulb voltmeter".  Get a
light bulb fixture and a light bulb; make sure both can handle 5 volts.  If
there are no wires attached to the fixture, solder one wire to the side of the
fixture and one to the bottom (I believe those correspond to + and - but you
may check with whoever you get the stuff from just in case).  Strip about an
inch of insulation from the end of each wire to make a probe, and you have a
voltmeter ready to use.  If it lights, obviously you have current.  You may
wish to test this with a battery, of course....
 
Hope that helps you out!

Robert Hood - programmer

 ProLine address: pro-gsplus!rhood
InterNet address: rhood@pro-gsplus.cts.com