Korg SV-1 left/right output balance is off

I’m not sure how this happened, but my Korg SV-1’s right channel is suddenly drastically lower than the left. For all outputs, headphones, main outs XLR and 1/4". I’m not sure how to fix this issue, it’s been a few months now. I’ve been having to use it in just mono and would like to fix the issue. Wondering if maybe I need to replace the input/output board for it and put it in, or maybe it’s the internal amp and that can just be replaced. Or perhaps it’s just a single component somewhere on the board that needs replacing. Or for all I know there could be a global pan setting somewhere hidden but I’ve definitely looked endlessly for that and turned up empty so far.

Figured I would post here in case someone has any ideas, much appreciated.