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From: paluzzi@oddjob.UUCP (Paul Paluzzi)
Newsgroups: net.micro.mac
Subject: Power Supply Voltage
Message-ID: <965@oddjob.UUCP>
Date: Mon, 16-Sep-85 12:09:02 EDT
Article-I.D.: oddjob.965
Posted: Mon Sep 16 12:09:02 1985
Date-Received: Tue, 17-Sep-85 05:49:13 EDT
Distribution: net
Organization: U. Chicago, Astronomy & Astrophysics
Lines: 27

*** Trust the Computer!  The Computer is your friend! ***
                                           
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?

Thanx,
Greg Hajek
:wq