ATT Broadband light blinking red? (Why this fix Work?) Guide

Are you having issues with the AT&T Broadband light blinking red?

Outages and interruptions in internet connectivity can be a total nightmare for many people. This is due to the fact that everyone relies on the internet in some way to get things done. It could be to surf the web, shop online, check emails, or work on a freelance project.

AT&T Broadband Blinking Red: How To Fix?
AT&T Broadband Blinking Red: How To Fix?

Having said that, some common issues can disrupt your home’s internet connections. For example, what does the red light on your AT&T router mean? What should you do if you notice a red light blinking on your router?

The truth is that a red flashing light or a red globe on the AT&T router is a common problem that internet users face nowadays. It means that there is no internet connection at all. As a result, whenever you see this, none of your internet devices will be connected.

On that note, there are a number of possible causes for the AT&T broadband red light flashing. The first thing to consider when troubleshooting a flashing red globe on your AT&T router is what the problem is. The flashing red globe indicates that a broadband signal has been detected but no connection has been established.

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Troubleshooting: Issues on fixing ATT Broadband Red Light Flashing

The gateway or power supply may be malfunctioning.Reboot your gateway. To do this, unplug the power cord from the back of the gateway for 15 seconds. Then, plug it back in and wait for the broadband light to turn solid green.
There’s an issue with the network service.Check for service outages using Smart Home Manager from your computer. Or, download the app from the Apple App store or Google Play store. If there is an outage, you will need to wait for it to be resolved.
Your gateway doesn’t have an internet connection.Check your cables to be sure they’re secure and not damaged. Then, press and hold the red reset button for 10 seconds. This will reset your gateway and hopefully restore your internet connection.
The battery is low or faulty.If the battery light is flashing red, your gateway’s battery may be low or faulty. You can replace the battery or contact AT&T for assistance.
The firmware is outdated.If your gateway’s firmware is outdated, it may be causing the red light to flash. You can update the firmware by connecting a computer to your gateway and following the instructions on the AT&T website.


Before we get into the specifics of the red flashing light and how to fix it, we must first understand what the various lights on the AT&T router mean.

  • A broadband signal has been detected, but no connection has been established.
  • There is no signal on a line if it is solid red.
  • Flashing green indicates that the device is powering on or attempting to connect to the internet.
  • A solid green signal indicates a good and strong broadband signal.
  • The LTE device is present but not functioning properly, as indicated by the flashing yellow.


Your internet connection will undoubtedly be disrupted by a flashing red globe. People are panicking because they don’t know what to do in this situation.

There are a few things you can do to try to solve the problem as soon as possible. It’s possible that all of this is the result of something minor. So take a deep breath and try the following exercises:

1. Upgrade the router firmware

It’s possible that your router’s firmware is out of date, resulting in the red flashing globe. Simply enter the IP address of your router into the web browser. You will be prompted to enter your sign-in information.

Following that, you will have access to an update section. Click on it to access the manufacturer’s website and download the most recent firmware. To complete the action, upload it. Check to see if the flashing red globe has vanished and been replaced by a solid bright white light.

2. Move your router

The red flashing globe is frequently caused by an extremely shaky connection that can’t maintain a stable internet connection. This could be due to an incorrectly positioned router.

This means that the router is in a location where it receives extremely weak signals, causing the red flashing light to illuminate. If this is the case, try relocating your AT&T broadband router to a different location away from its previous location.

Alternative Video: Fix ATT Broadband Red Light Flashing

Fix ATT Broadband Red Light Flashing


3. Avoid any interference

The flickering red light could also be caused by numerous signal interferences. If your AT&T router is kept near a lot of interfering objects, the signals may be extremely difficult to generate, resulting in the red flashing globe.

Remove any impediments or move them away from the router. Microwaves, cordless phones, and washing machines can all cause significant signal interference.

4. Check for overheating

Routers, like any other device, are susceptible to overheating. To check if the router is too hot, simply touch it. It’s possible that it’s overheated and, as a result, can’t function properly or generate signals as needed. That could explain why the router has a red flashing globe.


Assume you’ve already relocated the router, upgraded the firmware, and moved it away from common hazards; what’s the next step? To finally get rid of the red flashing light, you’ll need some troubleshooting solutions and pointers.

For starters, if the broadband light on your AT&T router flashes red, it could be a sign of a problem with the cables connecting to your modem. Aside from that, the issue could be within your physical network.

It’s now up to you to figure out how to fix the flashing red light and eventually get back online. Fortunately, we are here to assist you at every significant step. Here are a few useful tips to try:

1. Restart gateway

The first thing you should do is unplug the gateway’s power supply for at least 15 seconds. In the event of overheating, this should give it enough time to rest and cool. After that, reconnect it and check to see if the broadband light has changed from red to green.

This could take up to five minutes. That being said, make sure the connection is well established and back to normal. This solution works the majority of the time, but there is a small chance that it will not remove the red globe.

2. Reset your AT&T modem

Resetting the modem has come in handy in a variety of internet-related situations. Regardless of the problem at hand, it almost certainly works. As a result, resetting your AT&T modem may be the most viable solution for removing the red flash light.

You must gently press and hold the reset button on the modem’s back end for about 30 seconds. When the light changes from red to green or solid white, let go of the hold.

You can also choose to access the modem and reset it. Keep in mind that resetting the modem will reset the gateway settings to their defaults. Passwords, wifi usernames, static IP addresses, and SSIDs will all be lost as a result.

AT&T Broadband Blinking Red
AT&T Broadband Blinking Red

3. Check for loose connections

Check all cables and connections to see whether there are some which are loose. The connection might loosen if someone bumped into it and forgot to check. It could be that some cables were unplugged by mistake. Plug them back in tightly and to the right broadband port.

Remove any surge protectors, battery units, or other equipment that may be in the way of a direct connection to ensure a smooth connection. In addition, look for signs of wear and tear on the cables. Replace the worn-out cables with new ones if they are old.

A bent cable or one that is pressed tightly against a sharp object can also cause a red flash globe to appear on your router. All of this rectification restores the green or white light.

4. Change the connector

It is difficult to understand things like the connector unless you are a technician. A plastic connector is located at the end of the broadband cable. This is used to connect the broadband cable to the router or modem.

In this case, you should carefully inspect the broadband cables to see if there are any damages or if they are not functioning properly. If you suspect that the connector is the source of the problem, replace it and connect a new one at the other end of the cable. It may eventually aid in the resolution of the problem.

5. Reset it back to factory settings

Any of the solutions listed above can be used to restore the solid green light on your AT&T router. However, if all else fails, there is still a viable option for you. You may have inadvertently changed the settings on your router or modem.

If it isn’t you, it’s possible that an application you installed on your PC or laptop is to blame. If you can still connect to the internet through the modem, check its settings to make sure nothing is interfering with communication to your broadband cable.

Is there anything that could be causing the router to display a red flashing globe? If this is the case, it may be worthwhile to restore your AT&T router or modem to factory settings. It will then begin to work properly.

6. Check for outages

A power or internet outage can disrupt your router’s operation, resulting in the red flash globe. If you are unsure whether there is an AT&T internet outage, you can check their outage site for updates.

Storms or heavy rains, on the other hand, may disrupt the internet and cause problems. This is especially true if the service outage coincided with a power outage or storm.


To begin, you should not skip any of the steps or solutions provided when attempting to resolve the flickering red light on the AT&T router. In addition, an AT&T troubleshooting tool is available to assist in determining a solution. Aside from that, if the company investigates and discovers a problem on their end, they will do everything possible to resolve it as soon as possible.

If you are unable to resolve the problem on your own, you can schedule an appointment with an AT&T technician. Depending on the nature of the problem, it will be resolved sooner rather than later.

CONCLUSION on ATT Broadband Red Light Flashing

The majority of internet users have most likely encountered this problem at some point. We can all agree that some problems with the internet are unavoidable.

The most important thing, however, is to understand how to deal with these issues effectively. If you see a red flashing light on your AT&T router, don’t panic; instead, follow the solutions and tips in this article.

Why Is ATT Broadband Light Red On My Router?
Why Is ATT Broadband Light Red On My Router?

FAQs on ATT Modem Red Light Flashing

Why is my ATT broadband light still red?The red light on your ATT broadband gateway can mean a few things. It could be a problem with the power supply, the equipment, or the server connection. You can try restarting your gateway, checking the cables, or contacting ATT support for help.
What does it mean when my ATT router is blinking red?A blinking red light on your ATT router can mean a few things. It could be a problem with the power supply, the cables, or the firmware. You can try restarting your router, checking the cables, or updating the firmware.
How do I fix my ATT router blinking red?There are a few things you can try to fix your ATT router blinking red. You can restart your router, check the cables, update the firmware, or contact ATT support for help.
What should I do if my ATT broadband light is flashing red?If your ATT broadband light is flashing red, there are a few things you can do. First, try restarting your gateway. If that doesn’t work, check the cables to make sure they’re secure and not damaged. If the cables are fine, you may need to contact ATT support for help.

How do I fix my blinking red light?

A blinking or flickering red light on the AT&T router is one of the most common internet problems reported by users. That being said, there are a few solutions and tips for dealing with this issue. Resetting the modem is one way to get rid of the flickering red light on the router. It will only take a few minutes, and once completed, the internet will be back to normal and fully operational.

How do I troubleshoot my AT&T modem?

Actually, the first thing you should do is check the modem’s light indicators. If the power light does not illuminate even when the modem is plugged in and turned on, the modem is most likely not receiving power. A flashing power light indicates that the modem is not receiving a steady supply of power.

How do I fix my AT&T broadband connection?

There are several options, including restarting the wifi gateway. Begin by unplugging the power cord from the gateway’s back. Also, if applicable, remember to remove the internal battery. Wait about twenty seconds before replacing the battery and reconnecting the power cord if necessary. Allow some time for the modem or gateway to reboot and the broadband light to finally turn solid green.

CEO and Networketing at Sycamorenet | + posts

I am passionate about networking internet technology and connecting the world. I believe that we can make a difference by providing unique solutions that are reliable and easy to use. I am constantly innovating and expanding our reach to new markets. Our goal is to provide global access to affordable, high-quality internet connectivity. Join us in our mission to connect the world!

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