Korg KB repair

[cx]

hi there!

I've recently tried to revive one of my old KBs - a korg x1.

But its been spitting out lotsa static on its outputs.
my friend reckons the DAC is busted.

Do you folks out there have a 'how-to' fix this problem?
Or is there somewhere I can take this KB in for a repair of the DAC?

Thanks a mil!