Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!tank!scb1
From: scb1@tank.uchicago.edu (Sam Blackman)
Newsgroups: comp.sys.mac.hardware
Subject: Re: MAC SE Screen Jitters - HELP!
Keywords: Horizontal Lines, Shaky Screen Image
Message-ID: <8319@tank.uchicago.edu>
Date: 7 Apr 90 17:02:44 GMT
References: <15152@phoenix.Princeton.EDU>
Organization: University of Chicago
Lines: 32

In article <15152@phoenix.Princeton.EDU> jklee@phoenix.Princeton.EDU (James Kin Wah Lee) writes:
>I have a problem that somebody must have come across before.  Over the
>
>(1) Thin horizontal to subhorizontal "white" lines which slowly migrate
>up and down the screen from both the top and bottom of the screen.
>These are generally accompanied by screen flicker, and the lines appear
>randomly but often enough to be annoying.
>
>(2) The screen sometimes becomes slightly compressed (horizontally) and
>then "snaps" back to normal-looking display. 
>
Well, after living for 2 1/2 years, it sounds to me like the analog board
on your Mac is about to die.  While not a serious problem, it is somewhat
costly depending on where you go to get it fixed.  At the U. of C. Service
center (where I work), it would run you about $225 (with 8% tax).  

Usually, lines and fade-in-out, and sudden screen loss is indicative of
an analog board about to die.  The true sign of death is a thin, bright
vertical (or horizontal line) while everything else is OK (hard drive
boots, Mac makes normal sounds, etc.).

Does anybody who's every done board-level repairs on Macs know what exactly
dies on these analog board ?

Sam


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