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Hi there,Welcome to JustAnswer!Thanks for your question.
First, please restart all devices. Let me know if that works...If not, let me know if the TV works with other input sources except the cable box.Also let me know any other symptoms you may be having.Then we can continue troubleshooting...-------------------------Kindly rate my service 5 stars at the top of your question page if my answer is useful; tips appreciated :)You can still reply back to me at any time.Thanks,Pete.
Thanks for replying back to me. I am available 7 days a week.
You can ignore the phone call offer - we can reply back and forth here if you prefer.
You can also contact customer services to contact your subscription at any time.
Let me know what other input sources you have tried, and if all are affected?