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From: normt@ihlpa.UUCP (N. R Tiedemann)
Newsgroups: comp.sys.mac
Subject: Re: Burnt Mac+
Message-ID: <2536@ihlpa.UUCP>
Date: Wed, 17-Dec-86 12:50:57 EST
Article-I.D.: ihlpa.2536
Posted: Wed Dec 17 12:50:57 1986
Date-Received: Thu, 18-Dec-86 04:02:32 EST
References: <16644@ucbvax.BERKELEY.EDU>
Organization: AT&T Bell Labs, Naperville, IL
Lines: 29

> About two weeks ago I had an interesting experience with my Mac+. I turned it
> on and the screen was entirely black except for a pattern of white vertical
> blocky lines, no beep or nothing. The interesting part is that while staring
> ...
> The really interesting part came next, about 2 seconds after the screen
> went berzerk my Mac+ started to smoke! I was not imagining this, the distinct
> I got there, the dealer plugged in my Mac+ and it went on like nothing 
> happened! So I took it home and have been using it ever since without any
> my Mac+ when it smoked? I am afraid that one day when I am doing something
> really important my Mac+ is going to go berzerk again. Or maybe something
> more subtle is happening. I would be very interested if anybody else has had
> a similar experience or can tell me what condition my Mac+ is in.

I have had a similar experience with a VT100 terminal, most likely what
happened is an overload resister burnt out. The video board has a few high
power protection devices on it, and one of yours was bad. Well it took too
much current and burnt itself out. Now everything works, because the only
purpose of that device was for overload protection.

In my case, I opened up the terminal, and from the brown marks I could tell
which part was bad. Eventho it worked without the part I replaced it.

I would recommend you taking it back to the dealer, telling him the story and
have him check it out. The part should be easily found and replaced (and as
long as it is under warranty).

	Norm Tiedemann
	AT&T Bell Labs
	ihnp4!ihlpa!normt