All Casio and Yamaha keyboards include a limited manufacturer's warranty. If there are any technical defects with the keyboard, please contact Yamaha or Casio per the terms of the warranty. Make sure you have the keyboard's serial number and a proof of purchase before reaching out. Your proof of purchase can be found in your account Purchase History.
If there are technical defects with a Playground Sessions PG-150 keyboard, please email firstname.lastname@example.org.