RE: Messed up my Black Widow

I would carefully pull the roms and look for bent legs or damaged sockets.

Also check the resistance between the +5 & Ground on both boards. See how
close they are.

Possibly a bad cap, but in that case I would expect it to get hot and pop
pretty quick.

David

From: owner-vectorlist@vectorlist.org
[mailto:owner-vectorlist@vectorlist.org] On Behalf Of John Huie
Sent: Saturday, June 30, 2012 10:15 PM
To: vectorlist@vectorlist.org
Subject: VECTOR: Messed up my Black Widow

Hey guys, I've only posted here a couple times because I'm such a newb that
I am embarrassed sometimes but I thought maybe you could give me some
pointers on this.

I had a nice working Black Widow game and then acquired a spare complete PCB
and decided to test it in my cabinet. When I put it in, it had issues I
won't go into here but I decided to swap my roms from my working board onto
that one to see if it helped. It did, but I got wonky video that's beyond
my skill level so I figured I'd just swap the roms back onto the fully
working board and sell the the other board as non working.

However, when I swapped the roms back I got zilch from my original board.
No LED came on and I wasn't getting +5 at the board. But putting the broken
board back in still showed life so I knew it was something wrong with the
PCB that was originally working fine.

So....I screwed something up when I removed the roms or when I put them
back. Now I've tested resistance between the +5 and the Ground test points
and they are shorted together. Removing all the rom chips leads to the same
result....they are still shorted.

I'm stumped about how to figure out where the short is. Are there any tips
or should I just assume this is once again beyond my skill level and send
this thing off for repair now?

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Received on Sun Jul 1 05:27:10 2012