Check ALL connections through out the system. One check but not the only check is to Look inside the connectors on the ends of the coax and see if the outer foil shied and shield wires are pushed into toward or are touching the center conductor of the coax , the center conductor carries the signal , if so , push the foil shied and shield wires away from the center conductor with the point of a small knife or a small flat blade screw driver. A way to Prove Out reception is to have No splitters or other devices that can obstruct reception and use Known To Be good Coax cables. So the set up is , antenna , No preamp and No power inserter and the the coax goes Direct to one Tv that receives digital broadcast television. The Tv Must scan for the Digital Broadcast Tv Channels. Some Digital tv's menus show the scan for , 'Antenna Channels' or ' Air Channels' because the transmissions travel through the air from the transmitting antenna to your receiving antenna. Do Not scan for cable tv channels. If the reception proves out with no preamp and no power inserter then put the preamp and power inserter in the coax line.
