There are a few reasons this can happen. Here are the two most common ones:

1. There is a switch stack on the ball gate. One of the switches is normally closed when the gate is down, and it opens when the gate is energized. This switch turns off the replay button. If the ball gate isn't opening properly, or this switch isn't adjusted properly, then pushing in the replay button and holding it in for too long will cause continual resets.

2. If there is a closely gapped coin switch on the front door that is making contact from the reset vibration, then your game may be resetting several times because it keeps seeing a coin switch closure.

- TimMe

If those things look OK, and fiddling with the bank helped make it work better, then here are a few more suggestions:

1. Check that the large bank reset solenoid is working properly. In particular, check for mechanical binding of the bank reset crank arm. Binding can occur between the coil sleeve and the plunger; at the roll pin where the plunger connects to the crank; and at the crank pivot itself. Binding can also occur on the reset bar, which is attached to the bank. Check the reset bar pivots, and the contact point where the bank reset crank arm contacts the reset bar and pushes it up.

2. If this game has an armature switch (a solitary switch located on the bottom of the bank frame) clean and re-gap this switch and make sure it is closing when the armature for the relay (usually a reset relay) is pulled in.

3. Make sure that the bank is fully seated into the end brackets. Loosen the two wing-nuts that hold the bank in each end-bracket, and re-seat the bank in the bracket, pushing the bank forward into the bracket slots as far as possible. Re-tighten the wing nuts and make sure they are VERY tight.

4. Operate the bank reset solenoid manually by pushing in the plunger and confirm that the reset crank arm is pushing the reset bar up high enough so that all of the relays latch reliably. If they don't, and you've done all of the above, then you'll need to adjust the position of the bank reset solenoid frame until the reset bar is pushed up high enough to make the relays latch.

5. Clean and gap the motor switch that operates the bank reset solenoid to ensure it is getting a solid pulse. This switch is almost always located at motor position 2C, but if you have a schematic, check it to see where the motor switch for the bank reset solenoid is located.

6. Check that the fuse for the bank reset solenoid is in good shape. In particular, check that the clips on the fuse holder are clamping the fuse tightly, and that the fuse itself is intact with no loose end-caps.

- TimMe