HUBSAN H109S X4 PRO DRONE check gyro sensor problem

i have a hubsan h109s x4 pro standard edition drone and i cant get the motor to start.also im not getting any readings on the display from the drone like pitch',roll,heading.im getting a message on the display saying ‘‘check gyro sensor’’.can anybody tell me what this problem is and what may have caused it and how i can fix it,thanks,tony.