Discussion about the Korg PolySix synthesizer

I back again. I was able to track and find the problems with the power
supply. Replaced the Regulator and transistor and my outputs are good
and stable. Powered it up and I still have no sound. CAn anyone tel me
if this is a Battery issue. I would think a battery leak problem would
not allow you to store but would it cause NO SOUND? Looking for some
areas to next look at.

PS: wen i press the keys I do get the LED DIODES lighting up so
something is happening.\\

Any advise would be appriciated.