When you receive a cable tv set top box from comcast it will need to be activated before you can receive channels on it.
Xfinity hdmi cable box setup.
If your cable box has component connections the first thing you may want to do is contact your cable company and see if there is an upgraded box available.
Make sure this connection is finger tight.
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.
Newer x1 cable boxes can be activated directly from your tv.
If your cable or satellite box is connected with an hdmi cable use the following steps to get your picture.
On most comcast cable boxes the hdmi port is either in the bottom right corner of the box or at the bottom of the box s back.
Professional set up and self install.
Usually located in the top left.
It goes in the wide narrow port in the back of the cable box.
This process may take up to 10 minutes.
Your set top box will begin booting up.
Learn about wireless tv frequently asked questions.
Plug in one end of the hdmi cable.
Comcast will not activate cable boxes purchased used.
Press the input button on your vizio remote.
If you are using the hdmi cable you will only use one coax cable for your set top box connection.
Refer to your xfinity folder.
There are two ways on how to set up xfinity cable box.
Most cable and satellite boxes today can be connected with hdmi and that s a good thing because hdmi offers the best picture and sound.
Look at the port on your tv that the cable or satellite box is connected to.
You can activate your cable box online or by calling comcast.
Each port has a number generally between 1 5 depending on the model of your tv.
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3 plug the power cord into your set top box then into an electrical outlet.