All three other tbsp in house working, except main tv, says no signal
I am sorry to hear that the cable box has no signal.
A few things we will want to check is firstly the power on the back of the box, please make sure its nice and tight. After doing, please ensure that there is lights on the front of the box, and or possibly the time. If both of those are correct what you will need is change the input on your TV. In order to do this on your remote, you should see a button that says source or input, make sure the television is on the TV input by pressing the TV button if the remote has it. Then please press the input button until you see picture.
If you go through all inputs with out success, I would suggest unplugging your cable box, checking to ensure that the Coaxial is tight on the back. And then plugging the power back in and seeing if Picture is restored. The other thing you can try is unplugging the HDMI or input cable and plugging it back in. Hope this helps, and have a great day.
We can check to see if we can help you with this. It sounds like a connection problem, which could be caused by a loose cable. Have you checked to make sure everything is connected tightly? What kind of cable box do you have?
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