canyon bomber

socalarcade

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the game has comes up on free play but you can not start the game when you push the start button and all wires check out
 
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Have you put the game in test mode? According to the docs.
You should hear a falling bomb when a switch gets pressed.

Check to see if you got a loose wire.
Check the connector to make sure the wire makes good contact with connector.
Check to make sure the connector is firmly plugged in.

On page 36 I think the problem is problem is J8 151 I don't know if it a plain 74151 or a 74s151 or a 74ls151. Depending on the age of the board it could be any of the three..

While there is an inverting ic at J9. I don't think that is the problem. Since you did try to play the game in free play and the game didn't start for you in free play mode. There is no inverter in front of the start button. That start button ties directly to j8
 
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