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From: randyh@hpsad.HP.COM (Randy Hosler)
Newsgroups: comp.sys.atari.st.tech
Subject: Aerco mem board problem
Message-ID: <18420012@hpsad.HP.COM>
Date: 19 Apr 91 22:00:59 GMT
Organization: HP Signal Analysis Div - Rohnert Park, CA
Lines: 18

I have a problem with an Aerco mem upgrade I recently purchased.

It worked for about a month and then suddenly stopped. My computer would
no longer boot with the upgrede attached.  If I hook the board up and
then remove a single memory chip (any one will do) my computer will
boot, but of coarse it only sees 500k of mem. This is also the case if I
disconect either of the two ribbon cables from the board.

The memory is good, I checked it out.  The other thing I noticed was an
awful lot of noise on the +5 and ground lines of the board. This noise
is not present on the ST mother board. I changed all the caps and got a
little improvement.  

If anyone has seen this problem or can suggest some things I could still
check, please tell me.

Thanks,
Randy Hosler