Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!mhuxn!mhuxr!ulysses!allegra!princeton!orsvax1!pyrnj!caip!seismo!brl-adm!brl-smoke!geoffs
From: geoffs@brl-smoke.ARPA (Geoffrey Sauerborn )
Newsgroups: net.micro.atari16
Subject: UPGRADE!
Message-ID: <2585@brl-smoke.ARPA>
Date: Sat, 12-Apr-86 15:30:42 EST
Article-I.D.: brl-smok.2585
Posted: Sat Apr 12 15:30:42 1986
Date-Received: Sat, 19-Apr-86 14:44:23 EST
Distribution: net
Organization: Ballistic Research Lab (BRL)
Lines: 23

foo!
Well I did it. I attempted the fatal up grade. The good news is that I
did not fry my ST. She boots-up all right along with the 5 or six
accessories on the desk top [fonts,ramdisk,etc...]. The ramdisk says
~690+K byte available! Looks  good right!?

However a little after after boot-up,vertical lines appear up and down
across the whole screen!!! Sometimes the lines shift color as I move the
mouse. I can still run programs, copy files to and from the RAM disk,
but invariably, after a short time it crashes, lines and all. My
thinking is that one of the RAM chips is flakey. WHy?

	A. the vertical lines appear on every 8th pixel
					      ---------
	B. When pressing memory to its limit by coping whole disks into
	   the RAM disk, I can see the patterns of these vertical lines
	   change in exact sequence with the "clicks" of the floppy disk.

Questions: 1. Any suggestions on what else it might be? 
	   2. How does one test for a bad RAM chip?

		All comments will be MOST welcome. Thanks - Geoff
				     ****