Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!ukc!acorn!moncam!emmo
From: emmo@moncam.co.uk (Dave Emmerson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: PC Power Down Problems, Help!
Keywords: HELP PC
Message-ID: <377@marvin.moncam.co.uk>
Date: 23 Jan 90 19:18:14 GMT
References: <2608@stl.stc.co.uk>
Organization: Monotype ADG, Cambridge, UK
Lines: 24

In article <2608@stl.stc.co.uk>, philip@hazel.stl.stc.co.uk (Philip Hobson) writes:
> 
>  (before switching the monitor off) I woke up to find the base unit
>  powered down. (Powered down meaning the base unit it in effect off although
>  the power switch is on - the fan is stopped and the power light is off).
> 
[deleted]

This is the power supply's safety overload cutout. Given that you've had it
replaced, either you've got more add-ons than it can handle, or one of them
is trying to self-destruct, but being saved by the PSU.
Although accessing the drive does require more power, it's a thirsty
beast even when unused, and personally, I doubt that Sugar allows his
designers to build in more than the bare minimum of spare PSU capacity.
Bear in mind too, that the electricity supply in many areas may vary
by up to 20% of nominal between on-peak and off-peak times. This may
be in violation of regulations, but it happens just the same.
try removing one board each night to isolate a faulty one before you
switch to a higher wattage PSU, or you might come down to a heap of
cinders..

Good luck, you may need it!

Dave E.