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From: dale@wucs.UUCP (Dale Frye)
Newsgroups: net.micro.mac
Subject: Re: Power Supply Voltage
Message-ID: <1166@wucs.UUCP>
Date: Tue, 17-Sep-85 14:36:38 EDT
Article-I.D.: wucs.1166
Posted: Tue Sep 17 14:36:38 1985
Date-Received: Wed, 18-Sep-85 05:19:26 EDT
References: <965@oddjob.UUCP>
Distribution: net
Organization: Washington U. in St. Louis, CS Dept.
Lines: 34

In article <965@oddjob.UUCP>, paluzzi@oddjob.UUCP (Paul Paluzzi) writes:
>                                            
> Recently (2 weeks ago), my Mac's power supply was fried by
> a power surge.  I took it in to my dealer, who replaced the
> supply for me.  The problem is this:  since I got the computer
> back, the active screen area is much larger (extending up
> into the corners of the physical screen), and the bell is
> annoyingly loud upon startup.  Since I did not have this
> problem before, two possibilities have come to mind:
> 
> (1) My friendly dealer decided to give me some "extra," free
>     service.  This seems unlikely.         
> 
> (2) The new power supply is delivering more voltage than
>     the old one did.  I know the screen height and width are
>     controlled by pots inside the computer, and I would guess
>     that the beep could be controlled similarly.
> 
> Either way, I don't really feel like leaving my Mac in the 
> hands of this dealer again.  I would like to hear if anyone
> else has had a similar problem, or if anyone has any ideas 
> about the solution.  If the power supply voltage is the culprit,
> does anyone know where the pots that need adjusting are?
> 
 The power supply, video and speaker are on the same board. The technician
tht swapped out the board did a lousy job. He(or she) should have adjusted
the screen properly. There are set measurements for the screen in the
Apple repair manual. As far as the volume goes, I have a dumb question.
Have you adjusted the volume on the 'control panel' pull-down menu?

The case has to be opened to adjust the video. Take it back and DEMAND
that it is adjusted on the spot. It only takes a few minutes to do.

Dale Frye @ Washington University in St. Louis