Discussion about the Korg PolySix synthesizer

I have a PolySix that suffered from battery leakage that I'm trying to bring back to life for a friend. This is the fourth or fifth P6 I've worked on in the past year. It had the least amount of battery damage but has taken the most work. 

Anyway, here are my unresolved issues. The Program 1 LED is always on, the VCA attenuator doesn't work, and neither does the Octave switch. Any help?

Thanks,
Alexis