Path: utzoo!utgpu!watserv1!econadm5
From: econadm5@watserv1.waterloo.edu (BENTLEY BH - ECONOMICS)
Newsgroups: comp.sys.atari.st
Subject: Re: Dead Mega2
Message-ID: <567@watserv1.waterloo.edu>
Date: 10 Jan 90 14:58:19 GMT
References: <3906@jhunix.HCF.JHU.EDU>
Reply-To: econadm5@watserv1.waterloo.edu (BENTLEY BH - ECONOMICS)
Organization: U. of Waterloo, Ontario
Lines: 30

In article <3906@jhunix.HCF.JHU.EDU> rick@jhunix.UUCP (Eric Ruck) writes:
>
>OK, I've got a dead Mega 2 ST.  Probably the power supply.  For about 20
>seconds it sounded like there was a piece of paper caught in the fan, then
>the thing completely blacked out, no power light or anything.
>
>Thus far, my alternatives to getting it repaired seem to be either having one
>local repair center cannabilize a 1040 power supply at a cost (parts and
>labor) of around $200, or having the thing sent back for $60 and six or so
>weeks, none of which seem attractive to me.
>
>Is there anyone who has had this problem, and can suggest a way a couple of
>undergraduate EE majors can fix it?

 Well I have fixed several Atari St Machines and upgraded many of them.
 The cause of the power failure could be anything from grounding out
 the disk drive connector to the Dma port etc over a period of time.
 Most likely the cause was a cold solder joint that over time heated
 up and then had no connection. These cold solder joints can be located
 at various spots but from experience near C10 C11 or where any of the
 wires that enter or exit the power supply board. I have had to replace
 a leaky capacitor at c13 and a fuse time to time(normally due to improper
 disconnection of the power supply). Regardless before sending it off look
 high an low for a cold solder joint on the power supply board.
 
 If you require any more assistance send me mail and Ill see how I can help.

 Dave Tomesch , Super BBS (519) 749-1206 250Megs. Brain Bentley KWEST Editor
 " Never say Never"