Newsgroups: comp.sys.atari.st
Path: utzoo!utgpu!watserv1!maytag!watdragon!rose!hardware
From: hardware@rose.uwaterloo.ca ()
Subject: Re: My ST crashes
Message-ID: <1990Sep18.175317.17270@watdragon.waterloo.edu>
Sender: daemon@watdragon.waterloo.edu (Owner of Many System Processes)
Organization: University of Waterloo
References: <1958@ac.dal.ca> <2700@loria.crin.fr>
Date: Tue, 18 Sep 90 17:53:17 GMT
Lines: 24

 Ok just so I dont have to write alot of Mail to everyone your ST isnt
dead most likely its your internal power supply. The symptoms of a 
failing power supply, include having to reboot many times before
normal operation, repeated bombs on bootup, erradic working one day and not
the next, Lockup during ST operation. Of course there can be many other reasons
eg bad ram chip etc. But from running a bbs for 5 years my number one
problem was simply bad power supply. So to confirm this on a failing power
supply or one thats about to go, get out your multimeter and check the
power coming out of the leads going into your ST. If they are 8-10volts
for the 12 volt line and 2-3 volts for the 5 volt  line your power supply
will act erradic if at all. PS NOTE dont play with your power supply without
knowing something in electronic or you get a nice Zap or worse blow your
keyboard chips. So if you are not techincally inclined borrow a friends
ST for a day switch power supplies and see if that solves your problem. If
it does you have two options buy a newly designed power supply from atari
or fix your existing one. If you plan to fix your existing one you can
start by replacing C12 or C13 large capacitors 2200 and 4700 pf and if
that doesnt help I have replaced C11 and c12 on older model power
supplies. If anyone has any questions leave me mail. Hope that
helps. 

 Hardware Dave at your Service