SOLD - PARTS Konami TMNT PCB 4 Player - Has Issue - $225 shipped

RetroGamerJP

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Konami TMNT PCB 4 Player - Has Issue - $225 shipped

So I have a TMNT Board that works perfectly except for ONE (rather large) issue. Down does not work for Donatello..

it is NOT my wiring as I have tested continuity all the way from the switch to the pin on the board. It's not the ground, its not the switch ... It is definitely something with the board. I confirmed as well by putting in my spare TMNT board that works fine, immediately switch back to this board and problem resurfaces.

Board looks clean and I see no damaged traces.

Perhaps an easy fix for someone more knowledgeable than myself.
 
Last edited:
The fix was very easy, input problems are a common issue on Konami boards.The culprit is the custom resistor array '005273' or the IC connected to it (usually a multiplexer like 74LS257 or 74LS253).You could have fixed it yourself
 
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