I have the contact info for you:
email:
support@korgusa.com. Service centers are listed on
www.korgusa.com if it needs to go to one. If you wish to call, the number is 516-333-8737 but they are open 10-5pm EDT.
I still have the PX2 so unfortunately I can't help you out here. I have to refrain from toy shopping until after my wedding.