If all of sudden your ear piece stops working, check if it is still on. If it...
Replace the a dead base unit motherboard.
If the volume is on and you cannot hear the other person during the phone...
This guide will demonstrate how to reset your headset.
This guide will show you how to synchronize the headset to the base.
If the other person cannot hear you during the phone call, you may need to...
Replace a burned out headset motherboard.
This guide shows you how to remove the camera's batteries