Just picked up an Asteroid Annie a couple weeks ago in pretty good shape. Everything seems to work well (bumpers are a little weak but thats work for later). Currently the high score is all garbled and it has the original battery still attached (no corrosion but im debating on replacing the whole board or just adding a new battery pack). My main concern right now is the sound. When i first got the machine there was no sound whatsoever. After leaving it plugged in for about a week (power off just plugged in), when i turn the power on, i get a start up song. After one "round" of this the machine seems to reboot and the song plays again. Only the second time it starts to crackle near the end then stop altogether. There is no sound after this. If i turn the machine off and then back on again, I get no sound. I have to leave it off for a couple hours before it will sound again.
If I interrupt the start up sequence by trying to start a game I get a different sound tune play before it dies. I can never get a ball to fire before the sound dies altogether though.
This is my first system 1 and ive tried searching for issues similar but most people seem to have dead sound boards. This one seems to work, I'm just not sure where to start (MPU, power...?). I havent really had a chance to work on a machine before (usually working on vehicles and renovation type stuff, never full blown electronics) so this is my first dive into fixing something like this. Any help would be appreciated.
Annie Pin.jpg