Hi Don
I think I posted in the past about my experience with Korg service which was very positive. I had the Pa2x problem with failing LEDs. I sent the board back to them they even sent a UPS courier there and back in a week.
Maybe the distributers are at fsult Korg UK dealt with mine and I bought the board on eBay second hand. Seems a real shame when you like the board.
Best of Luck
Col