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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!