@grandingaccesscontrol: Common fault solution for our FA2000 face fingerprint access control terminal! Yellow warning icon + continuous beeping? Most issues are solved by installing the original back cover to press the tamper alarm button. We support OEM & private label for access control devices, welcome global distributors to cooperate! #AccessControlSupplier #SecurityManufacturer #FaceRecognitionAccess #BiometricAttendance #SmartSecurity #WholesaleSecurity