I see a coil of coax at the antenna.
Connect the coiled coax to the matching transformer.
Disconnect and bypass the preamp unit at the antenna.
Disconnect and bypass the power injector.
Disconnect and bypass the power supply.
Bypass the splitter , connect one Tv.
Reception now??
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If not then install a New coax from the matching transformer to the 1 Tv.
As a Test to prove reception , connect a New coax from the matching transformer to 1 Tv.
No couplers of any type or kind , No splitters , No electronics , No nothing.
It is the , Antenna , Matching transformer , coax , Tv.
Thats it , Nothing else.
Reception Now??
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As always , the Tv Must Channel Scan for the Digital Broadcast Tv stations/channels , often named the 'Air Channels' or 'Antenna Channels' in the Tv Setup menu because the Tv transmissions travel through the Air from the transmitting antenna to the receiving antenna.
Some Digital Tv's will automatic channel scan for cable tv channels.
DO NOT channel scan for cable tv channels.
Go into the Tv Setup menu and select the , 'Air Channels' / 'Antenna Channels'.
Digital Tv tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
Do a Double Channel Scan.
http://www.dtv.gov/rescan.html.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.