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The Xfinity Flex is one of the best streaming devices available. It comes with a plethora of apps ranging from news to entertainment. When Xfinity Flex fails, you must know how to repair it to avoid inconvenience.

However, before you can apply the appropriate solution, you must first determine what is wrong with the streaming box, why your Xfinity Flex is not working?

Whether the problem is intermittent or has rendered it impossible to stream anything, there are a few solutions to consider. These include everything from a simple restart to changing settings. In some cases, you may need to contact a technician.

Here are some troubleshooting tips for the most common issues that occur when the Xfinity Flex TV box fails to function.

Xfinity Flex Not Working
Xfinity Flex Not Working


Your Xfinity Flex, unlike any other streaming box, can be a little difficult to use. Probably, your internet isn’t in a good mood, or you haven’t connected the correct cable, or you have dead batteries.

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You may run into a number of such problems. Not to worry! If you follow the instructions above, you should be able to repair your Xfinity Flex.


1. Xfinity Flex Keeps Disconnecting

If your Xfinity Flex keeps disconnecting, it could be due to a faulty cable or signal interference. You may also have placed the box further away from your wireless router than is recommended. You can troubleshoot this issue by performing the following steps:

  • Check that none of the connecting cables are loose. You should also ensure that there are no damaged wires.
  • If you’re using a wireless network, keep the router close to your Xfinity Flex device.
  • Limit the number of devices that can connect to the same wireless network.
  • Restart your router and modem by unplugging them from the power source, then plugging them back in and attempting again.

If you use a security software program, such as a VPN, turn it off and see if Xfinity Flex will reconnect to the internet permanently.

Alternative Video: Xfinity Flex Troubleshooting Tips

Xfinity Flex Troubleshooting Tips


2. The Apps Are Not Loading

The most common cause of app failure on Xfinity Flex is an unstable internet connection. However, it is possible that the app you are using is experiencing a system-wide issue. To troubleshoot apps that aren’t loading on Xfinity Flex, follow these steps:

  1. Open other apps to see if they are functional. It will assist you in determining whether the app you want to use has a server issue.
  2. Check that your internet connection is stable. Begin by power cycling your modem or gateway (turning it off and on), especially if it keeps disconnecting.
  3. If you use Wi-Fi, try connecting an Ethernet cable directly to the Xfinity Flex box.
  4. Restart your Xfinity Flex streaming box by unplugging it for 30 seconds, waiting, and then plugging it back in.

In extreme cases, apps may fail to load because your device has accumulated a large amount of memory that needs to be cleared. That means you’ll have to perform a factory reset on your Xfinity Flex box.

  1. Switch on the Xfinity Flex box.
  2. Press the POWER and MENU buttons at the same time.
  3. Using the remote, simultaneously press the UP and DOWN buttons.
  4. Choose Restore Defaults.
  5. Click OK.

Because a factory reset deletes your saved data, you will have to re-set the device.

3. Xfinity Flex Is Not Turning On

One of the most common reasons why Xfinity Flex does not turn on is that you are entering incorrect information. It’s also possible that the issue is with your remote or a faulty HDMI cable or power cord. You can troubleshoot this issue by doing the following:

  • Check that you are connected to the correct HDMI input. Set your TV to HDMI 2 if your device is in HDMI 2.
  • Unplug the device’s two cables (HDMI and USB Type-C). Wait 30 seconds before plugging back in.
  • Check the batteries in the device if you normally use the remote to turn it on.

While it is unusual, your Ethernet cable or wireless network can cause your device to lose power. As a result, power cycle your modem or router to see if the streaming box turns on.

Xfinity Flex is not working? Complete troubleshooting guide
Xfinity Flex is Not Working? Complete Troubleshooting Guide

4. Why Xfinity Flex Is Not Connecting To Wi-Fi

When your Xfinity Flex is unable to connect to Wi-Fi, the issue could be with your login credentials, the device itself, or your entire network, including an issue with your ISP.

Consider the following:

  • Check that you entered the correct Wi-Fi network name and password.
  • Make sure your Xfinity Flex streaming box is connected to the correct wireless network.
  • Restart your device and try once more.
  • Restart your network devices.
  • Place your router in a central location or near the Xfinity box. The router should also be placed away from any potential sources of interference, such as electronics and furniture.
  • Reduce the number of wireless devices that are connected to the same network.

You can also run an online speed test ( to ensure that your internet connection is stable.

If Xfinity is still not working after completing the preceding steps, connect it via Ethernet rather than Wi-Fi.

5. Xfinity Flex Is Stuck On The Welcome Screen

When you turn on your device and it gets stuck on the welcome screen, it could be due to a faulty cable, network, or software.

Try the following troubleshooting steps:

  • Ascertain that you have a stable internet connection.
  • Make sure there are no loose cables.
  • Check that the HDMI cable is plugged into the correct input.
  • Turn off the device, wait 30 seconds, and then turn it back on to see if it gets past the welcome screen.
  • Restart your modem or gateway and reconnect using the Flex device’s WPS buttons.
  • If the issue persists, contact Xfinity Flex for assistance.

6. Xfinity Flex Is Stuck On A Black Screen

When you connect Xfinity Flex to your TV, you may see a black screen. Here are some solutions you can try to solve the problem:

  • Check that all power cables for the TV and Xfinity box are plugged into a working power outlet.
  • Check that none of the connections are loose.
  • Check that the HDMI cable is connected to the correct input. For example, in both the device and the TV, it should be in HDMI1.
  • To restore the picture and change the resolution to 720p, press Exit > Exit > Exit > 720 on your Xfinity remote.

Altering the resolution is another option. Go to Settings > Device Settings > Video Display after pressing the Xfinity button on your remote. Choose a resolution from the available options.

Why is Xfinity Flex Box Not Working?
Why is Xfinity Flex Box Not Working?

7. How to reset Xfinity Flex

You can reset the Xfinity Flex streaming box by following these steps:

  1. Turn on the device.
  2. Press the Power and Menu buttons on the remote at the same time.
  3. Use the Up and Down arrow buttons to navigate.
  4. Choose Restore Defaults.
  5. The next step is to press OK to complete the device reset.

8. Xfinity Flex Setup is Not Working

When your Xfinity Flex setup fails, the problem could be with your internet connection. It’s also possible that you haven’t properly paired the remote.

What you can do is as follows:

  • Connect the Xfinity Flex remote.
  • Connect your device to a reliable internet connection. Alternatively, you could connect via Ethernet.
  • Restart the Xfinity Flex box and your TV before attempting again.

If all of the above fails, you will need to contact Xfinity support services.

9. Sound Is Not Working

You may have muted your TV if your Xfinity Flex device is not producing any sound. However, there may be other issues that you can resolve using the methods listed below:

  • Check to see if you have the Flex box muted.
  • Ascertain that the Xfinity Flex box is directly connected to the TV.
  • Examine the audio input on the television. Navigate to Settings > Audio > Audio Input on your television. Check that you have selected the correct audio input and make any necessary adjustments.
Xfinity Flex
Xfinity Flex


You may experience a variety of problems with your Xfinity Flex streaming box, ranging from apps failing to load to the device becoming stuck on the welcome or black screen.

If your Xfinity Flex box isn’t working, try to figure out what’s causing it so you can find a quick fix. For instance, if the remote isn’t working, try replacing the batteries. Many problems with the device can be resolved by power cycling it. If nothing else works, consider factory resetting the streaming box and starting over.

Frequently Asked Questions

Why won’t my Xfinity Flex connect?

If you are unable to activate your Flex streaming TV Box, the most common solution is to restart it by reconnecting your USB-C power cord and HDMI cable to both the Flex streaming TV Box and the TV. You can also connect using a wired Ethernet cable to see if the problem is with your WiFi connection.

How do I fix my Comcast Flex?

Sign in to the Xfinity My Account app on your mobile device using your Xfinity ID and password. Tap the Troubleshoot button in the Flex section on the Services tab. Note: You can also access the Devices tab by tapping the Troubleshoot button after selecting the Flex streaming TV Box you want to troubleshoot.

How long does it take to set up Xfinity Flex?

Your Xfinity Flex streaming TV Box should arrive within three to five business days. Simply follow the instructions in the Getting Started kit to get up and running in no time. You’ll need the phone number associated with your account, so keep it close at hand.

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