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My name is ***** ***** Thank you for posting your query in JustAnswer.
I am sorry to hear that you are having trouble. I know that can be frustrating.
Hopefully, we can get this resolved quickly. Please allow me a few minutes to review your question to ensure that I don't miss anything.
Do you see the error message "No Signal" on your TV?
Can you please remove the power to the TV and any other devices connecting to the TV such as a cable box, wifi router etc (so unplug it from the power socket).
Then wait 10 minutes, connect the power again to the TV and connecting devices, turn it on, and tell me please if it is now operating correctly.
Let me know the results, please.
May I know who is your cable tv provider?
I am glad your issue has now been fixed.
Stay safe and have a great day.
I will disconnect now, stay safe, and have a great day.