i would check all your connections are tight first. It sounds more like a faulty componant in the wiring or a fault in the network itself. How long has it been off for? Give it some time and you may find that the issue is fixed outside your property on the network.
Welcome to the Community, I'm sorry to learn about the problems you're experiencing with your TV service recently.
I've located your account to run some tests on the set top box and we're detecting some errors with the service from our end, as a result I'd like to arrange for a member of the team to come and take a closer look at this, if you're available?
I've sent you information regarding this in a private message, which you can view by clicking the envelope on the top right of this page.