If you have less coverage than before it could be caused by a number of issues. First check your antennas and make sure that they are the appropriate distance apart and if you have a directional antenna outside make sure it is not pointing at your indoor antenna. You could also have overheated your amplifier, make sure it is in a cool place, outside of direct light, and with good airflow. Also if you have had a power surge recently you should check to make sure that did not damage any of the equipment. If none of these suggestions help, call your providers technical support.