I damaged the very top key on my xp80. Roland supplied my fixit guy with a new key and I hade it back within a week. I can assume by this that there was no other damage.

As opposed to going back to the shop, go to an authorised repairer. I would not have thought that the whole keyboard needs to be replaced, unless there is significant damage.

My repair cost me about $40 (Australian)

Regards

Trevor