How do I activate my cable box?

You can activate your cable box online or by calling Comcast.
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The quickest way to activate your box is to visit the Comcast Activation site:
Visit .Enter your account number and phone number.Wait while your cable box is activated. This may take 20 minutes or so to complete.

Why isn’t my cable box connecting to my TV?

First, turn off the power on the TV and unplug it. Then pull out the HDMI cable from either the box or the TV (doesn’t matter which). Plug the TV back in and turn it back on. Finally, plug the HDMI back into HDMI 1 and make sure the TV is on the HDMI 1 input channel.

How do I reactivate my Xfinity box?

Activate Your Equipment Online
Connect your Internet, Voice and/or TV equipment and turn it on.Go online to for easy step-by-step activation instructions. If you’re activating your Xfinity Mobile device, go to

Make sure you’ve tightened all cable connections from the wall to your device, turned on your TV and TV Box, checked your remote batteries and that your TV is set to the right input. If none of these worked, tap Continue. We’ll scan your device for potential issues. Choose a System Refresh or Restart a Single TV Box.

How do I get my cable to work?

Try these steps:
Make sure: Your equipment (TV and cable) is properly connected. The coaxial cable is connected to the outlet wall. Refresh your receiver or try using our TV Troubleshooting tool.Unplug your receiver, wait at least 60 seconds, and plug it back in.

Follow these steps to get the signal back on the cable box:
Switch off your Xfinity Cable Box.Unplug the device from the outlet.Wait for 10 seconds and then plug it back to the outlet.Press the Power button.Your device will then automatically restart.

How do I start Comcast service?

Getting Started kit
If you are new to Comcast, go to xfinity.com today to order your new Xfinity services. Your Getting Started kit will be sent directly to your home!Contact us to have an Xfinity Getting Started kit mailed to you.Can’t wait? Pick one up at your local Customer Service Center today!

How long does it take for xfinity to activate account?

Your Gateway or modem may take up to 10 minutes to be ready to activate. Make sure the lights appear as described below before moving on to the next step. Don’t unplug your Gateway or modem during this process.

You’ll see the Activation Code screen on your Roku or Roku-connected device. Go to from another device (like a mobile phone, tablet or desktop – not from your Roku). From the web browser, enter the six-digit code provided from the Roku device.

How do I activate my modem?

How to Setup & Activate a Modem for Any Provider
Prepare your Modem Info. Disconnect Current & Connect New Modem. Confirm Internet Access. Activate your new modem. Return your rental modem equipment. Check your next billing statement for a discount.

Why is my Xfinity cable box blinking blue?

The flashing blue light on your Xfinity router indicates WPS pairing mode. It means that the router is looking to establish a secure connection with a wireless device. Then, it automatically changes to steady white light, indicating a protected link between the gateway and another device.

Why is my Comcast cable box blinking?

If you see the Xfinity cable box blink green twice it is a sign that the digital adapter should be authorized. After the authorization process completes the blinking light should turn solid. Call the Service Hotline to authorize your Digital Adapter.

If you’re using a coaxial cable, your television’s on-screen input list will usually label it as either TV or ANTENNA. On the back of the television it will usually be labeled ANTENNA or a variant of it, such as ANT. Most televisions will also need to be on either channel 3 or 4 when using a coaxial connection.

What do you do if your cable box isn’t working?

Carefully unplug the Set-Top Box power cord from the electrical outlet or power strip if you’re using one. Wait 30 seconds while the Set-Top Box completely shuts off. Plug the power cord back in. The Set-Top Box will automatically reboot – this may take a few minutes.

Why is the TV saying no signal?

A “No Signal”, “No Source”, or “No Input” message will appear on your TV screen if the TV is not receiving a signal from your TV box. This is often a result of either the TV box being powered off, not being properly connected to the TV, or the TV being set to the wrong input.

What do you do when your cable says no signal?

Reset the box
Turn everything off at the wall.Check that all cables are securely and firmly in place.Wait for 60 seconds.Plug your TV box (not the television set) in and turn it on.Wait another 60 seconds, or until the lights on the TV box have stopped flashing.Plug everything else back in and turn it all back on.