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From: rock%warp@Sun.COM (Bill Petro - Program Management Office)
Newsgroups: comp.sys.mac
Subject: Re: Screen shows only one vertical line
Message-ID: <32955@sun.uucp>
Date: Wed, 4-Nov-87 18:47:00 EST
Article-I.D.: sun.32955
Posted: Wed Nov  4 18:47:00 1987
Date-Received: Sat, 7-Nov-87 16:00:14 EST
References: <4198@ihlpg.ATT.COM>
Sender: news@sun.uucp
Reply-To: rock@sun.UUCP (Bill Petro - Program Management Office)
Organization: Sun Microsystems, Mountain View
Lines: 21
Keywords: hardware screen

In article <4198@ihlpg.ATT.COM> jcrc@ihlpg.ATT.COM (Harton) writes:
>My Mac 512e (started as an 128k in 1984), displays the following symptom:
>When switched on, the screen displays only one vertical line, in de middle 
>of the screen. Everything works, just no screen image. Sometimes, the problem
>seems to disappear after a while (after heating up?). I would like to know
>what to do about it (besides replacing the analog board).
>Does anybody have any suggestions?
>
>Thanks in advance,
>Jaap Bood
>ihnp4!ihlpg!hvlpb!jbood


One problem common to upgrades is that the programmer switch does not fit
correctly with the new internal boards.  What you might do is loosen the 
switch (it's removable) a bit by pulling it away from the machine.  That
may explain the thermal expansion.

Bill "Worked for me" Petro

{cbosgd,decwrl,hplabs,seismo,ucbvax}!sun!warp!rock  Bill Petro