If you call Comcast, be sure to have your account information and ID on-hand.
The cable box should come with A/V cables. You can usually buy HDMI cables for under $15 online or in a tech store.
Leave the TV’s power cable plugged into the wall during the setup process.
The cable’s end has an attachment resembling a needle in the middle of it. Your cable box should have a coaxial cable included. If Comcast didn’t install a cable for you, you can attach the other end of this cable to the coaxial input in the wall.
If you’re using A/V cables instead, plug each cable into the same-colored port on the back of the box (e. g. , plug the yellow cable into the yellow input).
If you have a receiver with multiple HDMI ports plugged into your TV, you can plug your cable box’s HDMI cable into the receiver instead. If you’re using A/V cables instead, plug the cables into the same-colored ports on the back of your TV.
This input is normally on the right-hand side of the box.
Cable box and remote instructions vary from model to model, so consult your remote’s manual for instructions on synchronizing the remote with your TV and cable box.