Subject: mouse-crashes.txt
Date: Mon, 13 Jun 1994 15:33:48 +0900
From: Robert Morelos-Zaragoza <robert@is.aist-nara.ac.jp>

Dear moderators,

-------------------------------------------------------------------------
Someone posted a complaint in the usenet about the title of my previous
submission "malaysian-mouse-crashes.txt" and suggested that any reference
to "Malaysia" be removed from the text. I must oblige and enclosed is a
revised version
---------------  PLEASE REMOVE THE ABOVE LINES BEFORE POSTING -----------


Included is information on a crash caused by a defective ADB mouse II and
how to solve it. I do not know exactly where you could place this, maybe in
info-mac/info or something similar.

Robert Morelos-Zaragoza

==============================================================================
The startup crashes in my Mac (Centris 650) have been solved. They were
caused by a defective mouse. After I replaced the bad mouse with a known
good one, the crashes completely disappeared. The technical information
of the mouse is as follows:

FCC ID: BCGM2706
Family No. M2706
MB3313LFT18
Made in Malaysia

The strange thing is that instead of giving somekind of indication of
a hardware problem (like starting up with a "melody"), the Mac acted as if it
was a software problem. The key to solving the problem was a Technical Note
from Apple Computer, Inc. from their gopher site (info.hed.apple.com):
"Cure for Jumpy Pointer (8 93)". And since my mouse sometimes got jumpy, I 
decided to check on it. The note reads:

"...
A jumpy mouse pointer probably means you have a loose ADB cable (the one that
connects your mouse to your keyboard or your keyboard to your Macintosh). To
check it:
1) Shut down.
2) Turn the power off.
3) Secure the cable's connections.
..."

Lesson: If your Mac is crashing (mouse completely frozen, or momentarily
frozen after typing a charater in the keyboard, or mouse gets jumpy), and
after following proper procedures for a clean install of software system, the
problem reappears, then do the following:

1. Shut down.
2. Turn the power off.
3. Replace mouse.

If your Mac restarts OK, then you have solved the problem.

I hope this is of help to someone out there.

Robert

---------
Robert H. Morelos-Zaragoza, Visiting Research Associate
Faculty of Engineering Science             e-mail: robert@ics.es.osaka-u.ac.jp
Department of Information and Computer Sciences        voice: +81 (6) 850-3060
Osaka University, Toyonaka, Osaka 560 Japan              FAX: +81 (6) 850-3050