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From: vantreeck@logic.DEC
Newsgroups: net.micro.mac
Subject: Re: Failing analog boards
Message-ID: <882@decwrl.DEC.COM>
Date: Mon, 3-Feb-86 10:36:20 EST
Article-I.D.: decwrl.882
Posted: Mon Feb  3 10:36:20 1986
Date-Received: Wed, 5-Feb-86 01:20:46 EST
Sender: daemon@decwrl.DEC.COM
Organization: Digital Equipment Corporation
Lines: 19



>If it happens again, try replacing both that analog board and the power supply.

What I was trying to say is that the video circuitry is probably being damaged
by the power supply. I'm told by technicians that service a lot terminals that
this was once a common problem with some older models of low-end terminals. I
was told this when three video boards had to be replaced in my terminal, before
a technician recognized the problem, swapped power supplies, resulting in no
more blown video boards.

True, both power supply and video are on the same board on a Mac, and both are
swapped at the same time. I was unaware of that. Perhaps both being swapped at
the same time with the same problem recurring may imply a more serious problem
than an occasional case of a power supply gone bad? 


						George Van Treeck
						rhea::decwrl::logic::vantreeck