Hellp! RT power up LED sez "7c"

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#765

From: Steve Dyer
Date: Wed, 27 Jun 1990 16:23

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My RT crashed and burned this past weekend and now on power up
it simply reports "7c" in the LEDs.  This is before any attempt
to access the floppies, so finding and running diagnostics doesn't
seem to be an option.

The cheat sheet I have reports that "7c" means "Bad APC on IOCC--fatal".
Swapping APC cards doesn't seem to have an effect.  Anyone within IBM
who might have an idea of what's wrong and how to fix it?

-- 
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu, dyer@hstbme.mit.edu

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!snorkelwacker!spdcc!dyer
From: dyer@spdcc.COM (Steve Dyer)
Newsgroups: comp.sys.ibm.pc.rt
Subject: Hellp!  RT power up LED sez "7c"
Message-ID: <3291@ursa-major.SPDCC.COM>
Date: 27 Jun 90 16:23:14 GMT
Reply-To: dyer@ursa-major.spdcc.COM (Steve Dyer)
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 13