Discussion about the Korg PolySix synthesizer

Sorry, some of my formatting didn't make it through to the final post. I meant to include these. 

sound demo:
https://soundcloud.com/ocguitar/korg-polysix-death-sounds

Bank D and Program 4 constantly illuminated:
http://imgur.com/TFEPUPB

Thank you! Any advice would be appreciated.
-Steve

--- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
>
> Hello! I picked up a Korg Polysix recently and I've been trying to bring
> it back to life. Nothing I've done has changed anything yet so I'm at a
> bit of an impasse and I'm hoping someone out there might be able to help
> me narrow down what I should do next. I know how to use a soldering iron
> but I'm a complete beginner at repairing circuit board traces.
> 
> Let me give you the symptoms.
> 
> 1. It sounds like it's gone absolutely mental with constant oscillation
> and other insanity going on from the moment I power it up.
> 2. The Bank D and Program 4 buttons are constantly illuminated after
> powering up.
> 
> After cleaning up most of the corrosion I could find around the battery,
> it really didn't look as bad as I thought it might so I went ahead and
> just installed a Lithium battery holder (using Old Crow's guide) and
> tried powering up again. Nothing changed.
> 
> After that, I went back in and removed the IC31 chip (74LS08) and tested
> all the traces in the area with a multimeter. Every trace I tested gave
> me a happy little beep, even the uglier looking ones that were near the
> old battery, so I went ahead and soldered in a new socket and 74LS08
> chip at IC31. Powered up. Nothing changed.
> 
> Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> wires on the ugly looking traces even if my multimeter says they're
> conducting just fine? Should I replace the other ICs that were near the
> battery like IC30 even if they look fine?
> 
> I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> then I start to experiment:
> 
> 
> Bank D and Program 4 constantly illuminated:
> 
> 
> First sight:
>   <http://imgur.com/Wv173WQ>
> 
> After initial cleanup:
>   <http://imgur.com/M8POlkz>
> 
> Installed battery:
>   <http://imgur.com/Pj3kDFT>
> 
> Replaced IC31:
>   <http://imgur.com/Nab9GYz>
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>