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(Topic ID: 323633)

Looking for some help troubleshooting Bally MPU LED

By Enochsmoken

1 year ago


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  • 45 posts
  • 7 Pinsiders participating
  • Latest reply 1 year ago by Quench
  • Topic is favorited by 2 Pinsiders

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#19 1 year ago
 
237

slochar

Pinside member

7y 86,550 6,913

OP
Quoted from Enochsmoken:

Is a hardware reset done by the push button switch S33?

No. That triggers an NMI to the mpu.

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#21 1 year ago
 
237

slochar

Pinside member

7y 86,550 6,913

You duplicate what the reset circuit does by shorting mpu pins 39/40, then releasing (I use a screwdriver for this).

Other wise you turn the game off and on. There's no button on stock mpu board to reset it.

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