Hey @Fitzy17. Please verify that your internal chime kit is compatible with the Doorbell 2 from looking at the list in our Help Center Article here. If you find your chime kit is compatible but still not ringing with your Ring Doorbell 2, please give our support team a call at one of the numbers available here. We’re taking additional steps to protect our team and help reduce the spread of COVID-19. This has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support.