Home / Forums / Melodica construction, repair and maintenance / Cause of failed note on Yamaha P37D?? / Reply To: Cause of failed note on Yamaha P37D?? Reply To: Cause of failed note on Yamaha P37D?? January 23, 2018 at 7:44 pm #9649 david billerParticipant Thanks to all for your patience and help! I’ve messaged the Amazon vendor, waiting on reply, and messaged the person at Yamaha who handles this stuff to see if this is indeed covered by warranty. (FYI his name is John Carlson, and he’s at this email: firstname.lastname@example.org And you need to provide a US phone number and your pianica’s serial number) Failing that, I’ll be buying from the Yamaha site, as David I Am did. Will post the final result. thanks again!