Space Invaders not firing on 2nd player

cwales

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Anyone know why it would do this? It fires fine for the first player, nothing at all for second. I'm kind of new to all this and just got the machine today..
 
Check the voltage. See if you can bump it up slightly. I had a similar issue on one in the shop where it would fire on Player 2 only and not on Player 1. Turned out that the +5 was a little low and bumping it up a little made it work again.

Not sure if your power supply will have an adjustment or not. Mine was an aftermarket PS...
 
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