Discussion about the Korg PolySix synthesizer

Firstly I have repair battery leakage problem changing to new lithium battery.Then replaced IC31 chip with new socked.After that rewiring the board traces and keyboard cleaning procedure and changed SSM2044 chip to new one.I have record video,maybe somebody can tell where to dig?Please here is the link to video

http://youtu.be/vCEj_VPRm7U