Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pasteur!betelgeuse!carlton
From: carlton@betelgeuse (Mike Carlton)
Newsgroups: comp.sys.mac
Subject: Re: MAC II problems
Message-ID: <12037@pasteur.Berkeley.EDU>
Date: 6 Apr 89 03:27:49 GMT
References: <25251@pbhya.PacBell.COM>
Sender: news@pasteur.Berkeley.EDU
Reply-To: carlton@betelgeuse (Mike Carlton)
Organization: University of California at Berkeley
Lines: 24

In article <25251@pbhya.PacBell.COM> jwste@PacBell.COM (Jerry Steffler) writes:
 >A co-worker is experiencing a problem with her MAC II.  She powers the MAC up
 >in the morning and things run fine for about 1/2 hour when "blue dashes"
 >appear on the screen at random locations.  This happens in any application
 >she's using at the time.  Shortly after the blue dashes appear, the dreaded
 >bomb box/system restart message comes up.  Selecting restart doesn't help.  The
 >MAC is hung.  The MAC has been sent in for diagnostics twice now, the
 >first time the technicians not finding anything wrong.  Still awaiting the 
 >status of the second visit.  Apparently, this phenomenon will occur sooner if
 >the MAC is warmed up.  Unfortunately, I can't tell you much about the

I've had the "blue dashes" problem hit me twice now.  The problem was caused
by video memory chips working loose from the video card.  I simply pushed them
back in to make sure they were seated properly and the problem went away.

You need to be careful about static electricity when doing this, the chips are 
CMOS and can be damaged by small amounts of static electricity.  You need to 
ground yourself carefully.  If you're not comfortable with this, have someone
else do it for you.

Cheers,
--
Mike Carlton, UC Berkeley Computer Science	  | More bits,
carlton@ji.berkeley.edu    ...!ucbvax!ji!carlton  | Give me more bits.