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From: lrccon@ux.acs.umn.edu (Philip Arny)
Newsgroups: comp.sys.mac.hardware
Subject: need RAM checker (odd bars on upgraded mac screen)
Keywords: ram simm checker odd bars
Message-ID: <2247@ux.acs.umn.edu>
Date: 21 Sep 90 21:25:33 GMT
Distribution: usa
Organization: University of Minnesota, Academic Computing Services
Lines: 20

Hello out there... I recently got a MAC SE upgraded from 1 meg
(4 256k simms) to 4 meg (4 1 meg simms).  After the upgrade, it
had odd screen problems -- namely, evenly spaced dark vertical bars
about 1 pixel wide (stationary) all the way across the screen.

Does this sound like a problem with the new RAM?  A bad SIMM, perhaps?
What else might cause this?  Is the mac SE screen mapped from the main
RAM, or does the display adapter have its own memory?

Are there any good free/cheap RAM testers for the Mac?  And where can
I get them? 

Thanks, Philip Arny
Bio-Medical Library
U of MN twin cities
lrccon@ux.acs.umn.edu
-- 

Philip Arny, Bio-Medical Library, University of Minnesota
lrccon@ux.acs.umn.edu or lrc1@nve.hscs.umn.edu or lrc1@umnhsnve.bitnet