I 've just had a Roland XP-80 from a friend, everything works fine but there are some middle keys not sound when i press them. I need advice from somebody who know how to fix or where i can bring it to be fixed... Thank you for reading this topic and any advice
The contacts beneath the keys may be damaged or just dusty. If the dust spray doesn't help - send the keyboard for repairs. You may a few new keys or just a replacement contact that connects the keys with the motherboard.
If softdrink or other liquid has been split, it will need a careful cleanup to remove the problem. Also, try stand it on one end and giving it a gentle tap ot two on the back ( not too hard) . If it plays ok it may have something that has slipped between the keys and blocking the contacts. worth a go...........