Hello,
Just picked up a High Speed.
This is one of two immediate issues.
Background info:
CPU board has acid damage only at the battery terminals.
Score display driver board has one burnt trace, and not in the machine ATM.
All score displays unplugged.
All playfield lights, switches and solenoids are OK, All tilt/slam switches OK. Flipper driver OK.
Fuses are all good.
The CPU does work, I can execute a perfect startup sequence and play a full game.
When I play a game, everything except the AUX sound (and score display, but I'm working on that) works. When I mean AUX sound, I'm talking about the speech, playfield reaction sounds/scoring sounds.
The music plays fine.
The AUX sound driver board looks OK to my eyes, all connectors have been popped off and re seated. I carefully checked for pin 1 alignment on the CPU board ribbon cable. The ROM is there and the two socketed chips were carefully pulled and re-seated.
If you have any hints, please pass them along!
Thanks,
Tim