Path: utzoo!attcan!uunet!wuarchive!julius.cs.uiuc.edu!rpi!batcomputer!alchemy!sethcohn
From: sethcohn@alchemy.tcnet.ithaca.ny.us (seth cohn)
Newsgroups: comp.sys.mac.hardware
Subject: Re: monitor craps out occasionally on plus
Keywords: Mac Plus monitor problem
Message-ID: <514PV2w162w@alchemy.tcnet.ithaca.ny.us>
Date: 13 Jan 91 17:35:03 GMT
References: <7522@alvin.mcnc.org>
Organization: Alchemy International, Ithaca, N.Y.
Lines: 30

mccalla@mcnc.org (Bill McCalla) writes:

> A 3 year old Mac Plus a friend owns has the monitor
> blacking out occasionally. Everything else works
> and the monitor can usually be brought back to life
> with some whacks on the case, at least enough to
> see where to shutdown. This occurs immediately after
> startup and when the computer is warm.  No fan
> and recent upgrade to 2.5 mb.
> Thanx in advance.

That's the power supply on the way out..
fix 1 - resolder the following connections:
 (this is at your own risk - I accept no responsiblity and this is NOT
recommended by any one..... nuff said)
     series of connection where cable from logic board connects
         (don't forget the one slightly removed from the others)
     the flyback solder joints
     the high voltage joints - these arethe biggies
        (on old power supply with the paper cover held on by sticky pads
             these overheat and solder joints fail)
again I don't recommend this to any one (ONLY authorized Apple tech 
should go into the machine - THere are dangerous voltages in there!!!)
FIX 2 - RECOMMENDED - Take the mac to your friendly mac dealer and have
them check the solder joints


Seth Cohn - Ithaca NY - POB 671 - (607)273-2815 (eves)
Mac Service Tech to The Stars and most major Planets
The Highest Form Of Service Is Anarchy In The Defense Of The Self