Don't know where you're based here, but you could try hitting up [Only registered and activated users can see links. Click here to register]
, who are based in Dublin and service / repair all kinds of Korg, Moog and Roland synths. I've never used them personally, but I've heard good things about them.
Also have a look at [Only registered and activated users can see links. Click here to register]
, who are all over the place here in Ireland..they have their own in-hose repair service, which has been approved by the likes of Yamaha, Peavey, RCF, Roland, Fender, Korg, Boss, Marshall, Pioneer, Numark, Alesis and others. The link above will take you to their repair page, but I'm guessing you'll have to do a bit of digging to find out where to take or post your unit to get it repair.
Hope these help..best of luck and let us know how you get on.