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From: twakeman@hpcea.CE.HP.COM (Teriann Wakeman)
Newsgroups: comp.sys.mac
Subject: Re: SIMMs installation problem
Message-ID: <430108@hpcea.CE.HP.COM>
Date: 9 Jun 89 23:37:45 GMT
References: <8385@thorin.cs.unc.edu>
Organization: HP Corporate Engineering - Palo Alto, CA
Lines: 29

The SIMM slots on my Mac+ were black AND I had trouble trying to install
High profile RAM from MacProducts USA. I pushed a little too hard trying to
get a socket arm to lock down over the SIMM & the arm broke :*<

The problem was the lower row of DIP pins interfering with the
lower lip on the socket. The 'cure' other then replacing the socket
with another type is to clip the lower row of pins that stick below the 
board.  

CAUTION: use standard anti static techniques
         cutting pins may cause a mechanical shock to inside the package
            connections 
         Make sure that no matal chips bridge the space between pins

One strategy - use a special low static solder sucker to remove the
solder to the lowest row of pins. If the board has plated through holes,
clip the pins at the lower board surface, If not pltaed through, bend
pins flat against board away from adjoining traces {the pins will
probably need to be shortened}.  Resolder connections using a solder iron
approved for CMOS soldering.  The modified SIMM should fit without any       
problems.  You run the risk of destroying a chip or the board if you
are not experianced with this kind of operation. Be careful!! be antistatic

Another strategy - get rid of the SIMMs intended for this Mac {return, trade,
use in another machine, mail to me {;*)} } & get some SMT {lo profile}
SIMMs for this mac.

TeriAnn
twakeman@hpcea.ce.hp.com