I've had this issue for a while now, but I've got some more information and I'm also out of ideas. The theme music on my Spy Hunter plays at random intervals, even though the attract music is turned off with the DIP on the SSIO. It typically plays once when I turn the game on, then does not play for 15 minutes or so, then starts playing every 4-10 minutes, sometimes twice in a row. Here is what I know so far:
1. System maintenance menu shows attract music turned off
2. The IC leg connected to the DIP shows 5V when the DIP is off (pull-up resistor is OK)
3. The music only plays when the cable between the SSIO and the Cheap Squeak is connected
4. The big blue filter caps have been replaced with new from Bob Roberts
5. The 5V and 12V pots have been replaced (12V was causing speaker noise)
6. The ribbon cables have been replaced
7. The voltages check good
8. The game plays perfectly (including theme music)
9. The music does not play randomly with a Tron SSIO, but it does not play when it's supposed to either
Any ideas?
1. System maintenance menu shows attract music turned off
2. The IC leg connected to the DIP shows 5V when the DIP is off (pull-up resistor is OK)
3. The music only plays when the cable between the SSIO and the Cheap Squeak is connected
4. The big blue filter caps have been replaced with new from Bob Roberts
5. The 5V and 12V pots have been replaced (12V was causing speaker noise)
6. The ribbon cables have been replaced
7. The voltages check good
8. The game plays perfectly (including theme music)
9. The music does not play randomly with a Tron SSIO, but it does not play when it's supposed to either
Any ideas?


