I am out of ideas with my Bally Cheap squeak for my Lady Luck. Here is the short version of its history:

The volume was wonky when I purchased the game. It seemed to randomly get louder and softer. One day it stopped working. I changed the volume control in the coin door. The sound still did not work.

Next I recapped the sound board, no luck.

Next I diagnosed an issue with the cpu on chip on the sound board. I changed the chip and there was sound! I didn’t play the game for some time, the sound was gone again.

Next, I replaced the volume control in the coin door with the same pot that came with the game. The sound worked when it was wired incorrectly for a few days. After some friendly pinside help, I found out that the pot that came with the game was incorrect. I replace with the specified pot. Over the course of this time, the sound stopped working again.

I have recently burned new sound roms, tested the continuity of the roms to the board, and rigged up a stereo speaker to the game. Still no sound. When I press the red sound test on the sound board I get the right noise through the speaker.

I appreciate any help or ideas to fix this issue. I have spent way to much time on it. Thank you in advance.

I have not. It seems to still change the volume. What would cleaning it up consist of? I probably should just buy a new one. I take it the test button has nothing to do with Roms?

Update - I replaced the potential loose connectors. The sound works perfectly for about 15 to 20 minutes. Randomly mid-game the sound will stop. If you power the game off for 20 minutes and let it cool down, the sound will start to work again. I reflowed the pins on the back of the sound board. I am still having the same issue. Additionally, the test button will still produce sounds even when the game sounds quit. Thanks for the help.

No, it does not work. No sound is produced.

When the sound is working, the sound test plays one sound every second or so. I think that is what it is supposed to do?

To clarify - the sound test plays the same noise over and over again. Reading the manual it almost sounds like a different sound is supposed to be produced?

The solenoids seem to fire correctly in the test mode. They also seem to fire correctly when I manually ground them.

I did notice the one that flashes the lights (q14 I believe) seems to have some damage. See picture. Should something be replaced there? The lights seems to flash correctly despite the damage

I purchased a logic probe, but I really don’t know how to use it. Can you break down what I am supposed to do in more detail or is there a tutorial you would recommend?

Thank you for all of the help. 5F5BA349-6304-41B8-866E-28BD94AA0339 (resized).jpeg5F5BA349-6304-41B8-866E-28BD94AA0339 (resized).jpeg