..to be stored at a friends house because I am out of room. Picked up a Hyperball today, and something had to go. Unfortunately after I moved the Galaxian the sound wasn't working. Must not like it's new surroundings.
Check and clean the PCB's edge connector , like a dirty Nintendo NES cart . On my Galaxian the joystick stopped going to the right and the music would cut out . Cleaning that edge connector fixed the problems .