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From: dpaulso@k30b.nswc.navy.mil (Dave Paulson)
Newsgroups: comp.sys.next
Subject: upgrade question
Keywords: upgrade,simms
Message-ID: <1991Mar18.174121.1722@relay.nswc.navy.mil>
Date: 18 Mar 91 17:41:21 GMT
Sender: news@relay.nswc.navy.mil (0000-Admin(0000))
Distribution: na
Organization: NSWC, Dahlgren, VA
Lines: 23

My '40 upgrade kit arrived recently, and I spent some time installing
the new board this past weekend.  I had only one strange thing happen...

The memory diagnostics found a bad simm (in bank 0) when I booted the
'40 for the first time.  Swapping all of bank 0 with bank 1 moved the
problem to bank 1, so I know that the problem was not with the simm
slots on the board.  However, when I re-installed the '30 board, the
memory problem went away!

Can a simm be "marginal", and if so, what is it about the '40 board
that might tickle it enough to fail?

[to forestall some obvious questions: I _had_ installed 2.0, I _was_
properly grounded, I used the special simm tool to remove the chips,
they were seated firmly in the new board, and the 8 1-MB chips that
were in the cube were original NeXT memory.]

ps. 
watch this space for an update to William Smith's simm price guide.

--
Dave Paulson		dpaulso@relay.nswc.navy.mil (work)
Synetics/NAVSWC		talos!SandBox!dave@uunet.uu.net (home,NeXTmail)