Discussion about the Korg PolySix synthesizer

Guys,

Good news.  No more LED's stuck on. You totally helped me out.  Jed was right.  I found 2 traces that needed a jumper.  So much for my 'continuity is all good' comment.  Odd how I replaced the battery 2 years ago and it was working great until last week.  This corrosion thing is a bitch.  Turns out the the issue was related to IC 30 pin2 and Pin 3 needing jumpers.  Now the whole keyboard seems to work as it should EXCEPT for this one thing:

I can't seem to get the tape to work.  I ran the test mode for A/D and cannot get LED's 1 and 8 to come on.  Only 1 and 5 do, and the VR6 and VR7 adjustment only moves 1 up and down.  Thoughts?

John