New service - XFinity

I have already put in 4 phone calls. I am trying to set up my new set top box. I cannot get anything on my TV screen. I have the cable from the wall plugged in to the cable in. I have the power on and I have the HDMI cord plugged into the box and plugged into input seven on my TV and my TV input source is set to input seven.

This question, "New service," is about XFinity-Comcast TV television equipment.

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