Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!tank!gargoyle!dawyd
From: dawyd@gargoyle.uchicago.edu (David Walton)
Newsgroups: comp.sys.mac
Subject: Mac II startup problem
Summary: ADB causing startup failure?
Keywords: Mac II, monitor, ADB, startup
Message-ID: <434@gargoyle.uchicago.edu>
Date: 28 Jul 89 21:02:11 GMT
Reply-To: dawyd@gargoyle.uchicago.edu.UUCP (David Walton)
Followup-To: comp.sys.mac
Distribution: usa
Organization: U. Chicago Computer Science Dept. Macintosh lab
Lines: 36

I've had this problem occur with a few machines in the lab where I
work, and I'd like to see if anybody has any input.

Hardware: Mac IIs, 8MB RAM, 68851 (originally shipped with A/UX; some
          have had their partitions remapped w/o it), Apple 13" RGB
          monitors w/256-color video cards, Apple standard and extended 
          keyboards, various internal/external Apple hard drive 
          configurations.
Software: System 6.0.2 with and without Multifinder, Gatekeeper 1.1.1,
          some miscellaneous inits.  (I don't think software is the problem.)


When I hit the on switch on the keyboard, the power to the machine and
the monitor switches on, but the machine emits an arpeggio instead of
the standard startup chord and the monitor remains black.  After hitting
the reset switch, however, everything reboots just fine.

The clincher: if I shutdown completely, disconnect and reconnect the
ADB cable to the machine, and power on just as above, everything works
fine, ONCE.  If I then shutdown completely and try to reboot, the
problem reappears.  I've tried changing ADB cables, using different
keyboards, and booting off of floppies, and nothing seems to help.
The wierdest thing is, that after unplugging the ADB and rebooting, or
hitting reset, everything always works like a charm.  I suspect that
something is screwy with the ADB (for obvious reasons).  One final
note: I think this has only happened on machines that were shipped
with A/UX, but I can't swear to it.

We had one of these repaired a while ago; the repairman did nothing
except to remove a loose spring.  I wasn't able to find anything when
I opened one of these things up.

Please mail or post any suggestions.  If folks request, I'll summarize
to the net.


David Walton