The option to replace it is the dealer's, NOT Korgs, but even so ..... most reputable retailers would have swaped that for an identical model kb. If your dealer doesn't give you any satisfaction (that's the part you actually PAY for...) then I suggest that you send it to Korg direct and deal with the supplier. As an end user, you may have more chance of getting what you want. Give the company a chance - it's not their fault that the dealer is uncooperative.