Why can't I activate the equipment? Q A Possible cause: The tablet isn't connected to a network; the serial number and activation code are incorrect; the activation code is invalid; the configuration is empty. How to fix it: Make sure your network is stable. Then: 1) check if the serial number and activation code are correct (serial number 12 digits, activation code 8 digits). If problems persist: Please contact your dealer or TOPDON's after-sale service for timely support. 27