Many Comcast cable boxes have multiple HDMI ports. Make sure you’re using the HDMI Out port on the box and not the HDMI Input ports. If you don’t have an HDMI port on your TV, you can use a coax cable to connect the “To TV/RF Out” port to your TV’s coax port. This will not result in high definition image.
Connecting a digital adapter is pretty much the same as a regular cable box. Use a coax cable to attach it to the wall outlet, and HDMI or coax cable to connect the adapter to the TV, and then connect the power adapter. Make sure all of your digital adapters are connected and powered on before starting the activation process.
Visit xfinity. com/activate. Enter your account number and phone number. Wait while your cable box is activated. This may take 20 minutes or so to complete.
Have your account number and cable box serial number handy. If you have digital adapters, have the serial numbers for those ready as well. Call 1-855-OK-BEGIN (1-855-652-3446). Enter the requested numbers when prompted, including the telephone number associated with the account. Wait for your cable box to activate. This may take up to 20 minutes.
Make sure the TV is set to the X1’s input. You should see the X1 startup screen. Select your language and wait while the X1 starts up. The initial startup time may take a while to complete, and the X1 may have to download updates. Enter the information required to verify your account. This may be your whole phone number, the last four digits, or the account number. Select a name for your X1 box and then wait while it activates. This may take another 20 minutes or so to complete.
Don’t believe any listing or review claiming to have Comcast TV cable boxes for sale. They will not activate, and are most likely stolen.
If the problem is with your Comcast equipment or the lines leading to your house or apartment, you likely won’t need to pay. If the problem is with the wiring in your home, you may need to pay to have it rewired.
