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From: alex@grian.cps.altadena.ca.us (Alex Pournelle)
Newsgroups: comp.sys.mac.hardware
Subject: SE Hardware Questions: IWM upgrade, ADB filter
Message-ID: <1990Jun28.084809.9067@grian.cps.altadena.ca.us>
Date: 28 Jun 90 08:48:09 GMT
Organization: Workman & Associates
Lines: 31

Well, my roommate finally got tired of "only" having a Lisa and an Atari
ST with GCR for home Macs, 'n' bought an SE/20.  Naturally, the Gods of
Fate caused it to fail upon startup at home (it's used) and I cracked
'er open.

Symptoms are the usual crackling and ticking noises from the power
supply on startup, then nothing.  Occasionally we got startup, but then
the keyboard and the mousk wouldn't move the cursor or do any functions.
Aargh.  Had to just turn it off (contrary to my every instinct).

After a bit of fiddling, we determined that the ADB filter chip is
likely the culprit (hot and smelly).  Anybody know who makes or where to
get?  It's by "Tokin", not known to us.  This is the newer board with an
ADB chip instead of much discrete glue (I sure hope IT'S okay or we're
really up a creek).

Also, does anyone sell newer IWMs that will eat FDHDs directly?  I know
that it's the only change necessary to support 'em, but Apple isn't real
generous with the upgrade chips (try to get the equivalent of a "Fatter
Agnes" out of 'em :-).

My first call tomorrow is to Pre-Owned but I thought this an appropriate
subject for net bandwidth.

	Thanks,
		Alex
-- 
		Alex Pournelle, freelance thinker
		Also: Workman & Associates, Data recovery for PCs, Macs, others
		...elroy!grian!alex; BIX: alex; voice: (818) 791-7979
		fax: (818) 794-2297    bbs: 791-1013; 8N1 24/12/3