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From: stephen.shaw@digitec.co.za (STEPHEN SHAW)
Newsgroups: comp.sys.apple2
Subject: My //e fails to turn on!
Message-ID: <8B8A08A.02210015A8.uuout@digitec.co.za>
Date: Thu, 11 Jan 96 02:18:00 +0200
Distribution: world
Organization: Digitec Online - South Africa
Reply-To: stephen.shaw@digitec.co.za (STEPHEN SHAW)
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Hello Alberto!

On 01/02/96, Alberto Roffe wrote to All:


 AR> I am having some problems with my Apple //e! It fails to turn on! I
   > have to turn its power switch on and off several times and sometimes
   > wait a long time till it finally powers up!

    Are you using an uninterruptable power supply (UPS). The output should
be sine wave but some components in them change with age giving a square
wave that Apple power supplies don't like.


 AR> What could be the problem? The power supply? Would replacing it solve
   > the problem?
   > Someone suggested me that the power switch might be wearing off so I
   > decided to leave the computer turned on and just turn off the
   > regulator where I connect the computer and all its peripherals but the
   > problem persists! So that can't be the problem, or can it?

    If you open the power supply up (WITH THE MAINS PLUG OUT!) you will
find a capacitor C7 near the transformer in the middle of the printed
circuit board (a 220 uF 16V capacitor if I remember correctly) change it
for a 220uF 25V 85 degree Centigrade rated capacitor and it should clear
the problem up.

 AR> I also checked the computer's power cord at both ends, connecting and
   > disconnecting it several times without success, and I checked inside
   > the computer; the power supply seems properly connected to the
   > motherboard. Thanks for any advice.

 AR> ----------------------------------------------------------------------
   > ------ Alberto Roffe Illades                   You never know what you
   > have Roffe@delphi.com                             until you lose it
   > ----------------------------------------------------------------------
   > ------

 * 2qwk! 2.0 * Insomnia isn't anything to lose sleep over!