Asteroids/Asteroids Deluxe

From: Evrovski, Andrew <andy_at_cyberplex.com>
Date: Thu Aug 23 2001 - 11:10:00 EDT

ok, so here is my very troublesome problem.

I have 2 Asteroids boards and 1 Asteroids Deluxe board and I meter across
the BIG FAT GND trace and the 5v FAT line (these fat strips are actually
striped down the board in alternating patterns GND, 5V, GND 5V...etc) to
check and I find that board #1 is 3 Ohms, Board#2 is 19 Ohms an board#2 is
90 Ohms. These are essentially shorts. My multimeter (put in continuity
mode) beeps (continuous tone) to let me know that it is in fact a short.

So.... Given the fact that these are shorts (and all my known working boards
are not shorted - obviously since that would be close to tying power to
Ground), I am at a loss. How the heck does one determine what component is
doing this (outside of an actual solder blob or trace issue). Anything, and
I mean, pretty much anything can cause this. Capacitors (my first pick),
faulty chips (these potentially could fail in such a manner as to short
their GND and VCC lines, can't they), transistors etc...). Making
measurements on the board is now useless since every component that ties to
both GND and VCC will register a short. For the life of my, I don't know
how to figure out which component is responsible without yanking every damn
chip or every damn cap that goes across 5V and GND.

Any help, and I mean any help, would be appreciated.

Cheers
Andy

Andrew Evrovski
HPC Development Director
Cyberplex
t: 902.429.4721 ext.109
f: 902.423.0899
www.cyberplex.com
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Received on Thu Aug 23 08:13:23 2001

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