How to Fix Xfinity TV Black Screen With Sound? (2022)

How to Fix Xfinity TV Black Screen With Sound?

I bought an Xfinity TV around two months ago. 2 weeks later, my screen goes dark for a brief moment. For the following ten minutes, this will occur at 5-second intervals. There isn’t much more I can say about how irritating this situation may be.

Things worked themselves out later that day. I assumed that it was a momentary problem, but it wasn’t. And then it occurred again, precisely two weeks later! There had to be a solution to this problem, whether it was a temporary malfunction or not.

It’s possible that if you’re here, As soon as a black screen appears on your TV, it’s referred to as a “death screen,” and after seeing this, every owner assumes he’ll have to purchase a new system.

In certain cases, the black screen is not a sign of a system failure but rather an underlying problem that may be fixed. Begin by experimenting with a few tried-and-true methods for resolving the black screen TV issue.

As a result, you were watching TV when the image abruptly blacked out or began to fade gradually. Why don’t you try some of these fixes before calling in a professional repair service?

The breakdown of one of the power boards is the most common cause of a black screen. Exactly what happened?

Execute a sound-level test. Try listening attentively for any distinct noises that might indicate how well the equipment is working, and if you find any, switch on the television.

After that, a mild test should be performed. Make sure that the TV is turned on by shining a flashlight at the screen; if you see a picture, the issue is that one of its panels has failed.

There are two more things to verify before moving on: cable and power. Your TV may merely have contact points on its wiring, which may be all that’s needed to fix it. It may be necessary to unplug the TV from the network, do a hardware reset, and then re-enable it if everything is connected properly.

If none of the suggestions above helped you, you should contact the wizard at the service center and report the error. You should inform the master about your completed exams and their outcomes in the consultation.

In light of this information, the wizard will be able to identify and fix the issue on your television rapidly.

 You’re going through something similar. Continue reading to see how the internet assisted me in resolving my problem, and you’ll learn how to repair yours as well.

If your Xfinity TV screen is dark with sound, you may have a cable or connection problem. Check your membership status, power saver settings, and HD content to see if any of these work.

Check Your Cables and Connections

Comcast signals are delivered to your house using coaxial wires. Make sure the cables are securely attached and inserted into the correct slots.

Remember to use extreme caution while working with these wires. Your TV’s AV quality may suffer as a consequence of twisting and rotating it needlessly, which will cause harm to the transmission of the signals.

These wires had been severely damaged in my situation. Since I replaced the coaxial lines, my Xfinity TV has been operating well.

The Xfinity cable box must be troubleshot independently if it doesn’t function. The sudden handwriting of the screen and subsequent restoration of its operability are issues that many contemporary television users confront. So, what are your options, and where may they lead?

It is best to call the service center as soon as possible if you do not want to bear any more interruptions in the form of a sudden black screen on your TV.

First things first: make sure you have an audio signal on your television when you turn it on, check all the power and wiring connectors, and make sure you have a flashlight handy before calling in the wizard. Before the technician comes, maybe you can have everything set up.

Xfinity TV Black Screen With Sound

HD Issues

A problem with your HDMI connection or port may be to blame if you are experiencing this intermittent blackout when viewing HD channels. To begin, try a different HDMI slot, such as slot 2, if you’re currently using HDMI slot 1.

You may try lowering the display’s resolution in the options as an alternative. Let me show you how. What to do if you want to alter the resolution later?

Set up your devices by pressing the menu button on the remote and selecting the option for ‘Device Settings.’ The video is shown on the screen. If this doesn’t work, you may have to buy a new HDMI cable.

A broken HDMI cable should not be kept around for too long since it might interfere with your internet connection and create major issues with your television. Resetting your Xfinity remote is necessary if it becomes unresponsive.

But if the HDMI cable is connected and a warning appears that tells you to troubleshoot your device, you may have a mildly damaged HDMI port that may be readily repaired.

If the notification says ‘FAILED,’ your HDMI port is most likely destroyed. Press Exit three times on the Xfinity remote control before pressing 720. 720p video quality will be achieved.

Active Subscription

You’ll need more than just a Comcast cable set-top receiver box to watch your favorite programs and basketball games. You must, however, be a paying subscriber to these services to access them.

Your favorite channels and certain extra services may be unavailable since you haven’t paid for the membership or expired.

In the event that you pick a channel or service that you have not paid for, you may see a blacked-out screen.

Power Saver Settings

Try disabling power saving in your device’s settings if you still have a blank screen. The device’s performance may suffer due to power-saving measures, and downloading updates may take longer.

You may disable this feature by following these steps:

Configuration Device settings Power preferences Power saver begins after This should be turned off at this time.

Xfinity’s box will need to be turned off and back on after a few minutes. Check to see whether the problem has been fixed. If you don’t do this, you won’t accomplish any of this.

If you were using the Apple TV Comcast Workaround to cast off your iPhone to the Xfinity Cable Box, it’s possible that your iPhone’s battery was running low. This should be resolved by plugging your iPhone into a power source.

Hardware Defect

There is a chance that your computer’s hardware is defective. Ensure that your hardware, television, and set-top box are working properly by regular checkups.

Make sure that Comcast is providing timely updates to your set-top box. You may also try wiping the device clean and starting again.

The cable box should be disconnected from the power supply for 30 seconds and then plugged back in. It will now be able to check for updates without being rebooted.

Contact Customer Care

Customer service may be necessary if none of the other techniques work for you. Make it clear that you need a specialist to come to your house and fix the problem. Xfinity’s contact information and hours of operation may be found on the company’s official website.

Final Thoughts

The XRE-03121 Xfinity Error may be present if the black screen is accompanied by an error message. If your Xfinity sound isn’t working, try pushing Mute on the remote to see if the sound will come through the TV. The DVD or VCR in your house should always be turned off while not in use.

Second, check if the backlight hasn’t burned out on your LCD TV if you’re having this black screen problem. Replace it immediately if it has. Before choosing whether or not to replace an HDMI cable, follow these three steps:

Repeatedly press the Menu button to access the application’s settings. After that, go to the Audio Setup section of the Menu. If the HDMI sound is turned off, turn it back on by going to the HDMI sound option and turning it on.



How do I reboot my Xfinity box?

Your Xfinity box may be restarted from your account. Check your Xfinity account. Troubleshoot the TV Continue to Manage the TV.

System refresh or device restart is your alternative at this point. Start troubleshooting by selecting what you need and pressing the Start button.

How do I fix my Xfinity sound?

Navigate to the Main Menu, choose Setup, then Audio. Set the stereo volume to its best setting. Yes, You may have to repeat this method a few times to get the desired results.

What causes dark shadows on TV screens?

Dark shadows may appear on TV displays if the broadcasting signal is unsteady or a bad wire connection is present. This may be seen when a picture has been on display for a long period in certain cases.

How do I get my TV picture to fit the screen Xfinity?

Press the Xfinity button on your remote to begin. To access the device settings, go to Settings > Device. Go to the video display settings on your device and pick the video output resolution and aspect ratio that you want.


Electronic devices are like an addiction to me. Years ago, I started my job at an audio/video installation co. Then I realized that I have a passion for home theaters. It is a perfect scope to share my different experiences about electronics and home theaters.

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