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To Prove one way or the other and what the actual problem or problems are.
Connect a NEW Continues length of coax to the antenna and run the NEW Continues length of coax through a open door or window direct to one Tv and then direct to the other Tv.
No splitters , No couplers , Just a Continues length of coax from the antenna to the Tv/s.
Scan for channels on each Tv.
Digital Tuners can develop -Digital Glitches- that are not cleared out with simple channel scans.
To clear tuner do Double Rescan.
www.wchstv.com/DoubleReScanAlert.pdf
The Tv Must Channel Scan for the , ATSC-Digital Broadcst Tv Stations/Channels.
Do not channel scan for cable Tv channels.
Do not channel scan for only Analog Tv channels.
If the Tuner in the Tv is still not working correctly , then here are some Digital Tuners that can be connected to the Tv.
www.epvision.com
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The coaxes through out the inside and outside of the building that are used for the antenna system must only be used for the antenna system and Must Not Be connected to Any Type Or Kind of Fios delivered services and Must Not Be connected to Any Type Or Kind of cable tv delivered services.
Any Type Or Kind means Any Type Or Kind , Not Fios delivered or cable delivered cable channels , Not Fios delivered or cable delivered internet service , Not Fios delivered or cable delivered phone service , Or any other type or kind of Fios delivered or cable delivered service.
Remove , splitters , couplers , and other devices that have any thing to do with Fios or cable delivered services.
If their has been satellite service , remove the devices that have to do with satellite service.
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Coax -->Every Where<- and coax connectors , and couplers , and splitters , and any other type or kind of devices that are connected to coax Can Be Defective.
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The Digital Current Plus Pending Applications Included Channels List and Radar Report shows Tv stations in the directions of , North West , West , North East , East.
For improved reception of Tv stations of those directions install the , CS2V , Clear Stream2 UHF/VHF antenna.
Above the Peak of the Roof in such a manner that reception is not , obstructed , impeded , blocked , by the roof and building in the directions of , North West , West , North East , East.
Aim the antenna at about 270 degree magnetic compass direction.
Here is how to aim antenna ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antenna.
As Always , trees and tree leaves , plants and plant leaves , have a Negative Effect on Broadcast Tv Reception with a Tv Antenna in the directions of reception and so do , attics , roofs , buildings and other obstructions in the directions of reception.
Some and not all Negative Effects are.
Absorbing and Blocking Reception.
Multi-Path Reflecting Tv Signals Bouncing All Around.
The Best Practice for Reliable Reception is to install the antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception including your own roof and building.