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How to Fix AT&T Router Blinking Red (6 Easy Methods)

How to Fix AT&T Router Blinking Red (6 Easy Methods)

A red blinking light is never a good indication. That’s especially true if it comes from the internet-connected devices you use to complete tasks, watch your favorite shows online, and more.

The truth is that a flashing red light on the AT&T router is a typical issue that modern internet users deal with. It implies that there is entirely no internet connection. Therefore, none of your internet-connected gadgets will be functional.

Don’t panic, though, thinking that the hardware is broken or already defective. In this article, we will be covering what this red light means. Additionally, we’ll provide you with a thorough explanation of how to resolve this annoying problem.

What to Do?Explanation
Move Your RouterPlace your router in a different location where it can get better signals.
Check for loose connectionsEnsure that all of the cables are connected properly. Maybe someone bumped into the cables and the connections got loose.
Change the ConnectorMaybe there is a problem with your cable connector. Check it carefully. If the plastic connector at the end of the broadband cable is damaged, replace it immediately.
Power Cycle Your Gateway or ModemTry power cycling your modem. Shut it down for a few seconds. Disconnect the device and reconnect to the power source after at least 60 seconds.
Update Gateway FirmwareUpdate your firmware to the latest available version. This can also resolve your issue. When you reset your gateway, AT&T will automatically update it.
Call Customer SupportIf nothing works then talk to the people at AT&T and tell them about your issue.
An overview of six methods to fix AT&T Router Blinking Red

What Router Does AT&T Use?

AT&T requires BGW210, 5268AC, or NVG599 Wi-Fi Gateway routers.

These are standard router models that come with AT&T’s broadband plans. Other routers like Google Nest wifi also come with their plans. Other models like TP-Link Archer A8 are good budget-friendly compatible modems as well. However, there are also options like the Netgear RAX50 that allow parental controls.

Does AT&T Give You a Free Router?

Routers come with AT&T internet plans.

However, they are technically not free. You pay a one-time price for the routers when you purchase an internet plant from AT&T. You can also rent modems and routers for around $10 a month. Alternatively, you can also buy other compatible models if you wish.

What Does an AT&T Broadband Red Light Mean?

White and black modem with four lights turned on, indicating different things.
Black and White Modem

The modem gateway should be lit up in green when your AT&T broadband is operating as intended. However, the problem arises if there’s a red light, which could indicate a problem with the power source or gateway.

Why Is My AT&T Broadband Light Flashing Red?

A video explaining the reason behind the red flashing light.

The broadband light on your gateway flashing red can be so annoying. But don’t worry; it’s typically only a slight issue with the device’s power supply.

One of the most frequent causes of this is due to:

On the other hand, it’s a different situation if you see that your AT&T broadband 2 light is blinking red. The service being down or undergoing maintenance is a common cause of this.

Because AT&T engineers would be the ones to fix it, you won’t be able to do this on your own. You would have no choice except to wait and ask the AT&T team for updates.

How to Fix the AT&T Broadband Red Light Flashing

A rectangular grey corded device full of different types of wires and cables.
Grey Corded Device

1. Move Your Router

Your router’s placement could occasionally be a source of the issue. The signal may become stuck as traffic if it’s positioned in an area where it may be interfered with by other Bluetooth or electronic devices.

When this occurs, your network will detect the weak signal and alert you by blinking the red light.

Hence, moving the router to a location with less interference might help with this issue. Usually, it’s a good idea to put it somewhere high.

Once you’ve tried these two suggestions and nothing has changed, it’s time to move on to some other fixes.

2. Check for Loose Connections

Grey ethernet cable that connects the router to your laptop or computer.
Ethernet Cable

Look at every cable and connector to check if they are firmly attached. If someone bumped into the connection and failed to check it, it could become loose. Moreover, it’s possible that some cables were accidentally unplugged. Reconnect them firmly to the correct broadband port.

To guarantee a smooth connection, remove any surge protectors, battery packs, or other equipment that might be in the way of a direct connection. Additionally, keep an eye out for cable wear and tear. If the cables are outdated, swap them out for fresh ones.

A red flash globe may also show on your router if a cable is bent or pressed firmly up against a sharp object. 

3. Change the Connector

A close shot of two ports of a router.
Router Ports

Technical expertise is not required for this technique. The broadband cable has a plastic connector at the other end. It establishes the link between the broadband cable and the router. Just make sure to thoroughly inspect the broadband cables.

Check for any damage that prevents it from operating properly. But if the connector causes the problem, replace it right away. Connect a new one after that. It might eventually assist you in finding a solution.

4. Power Cycle Your Gateway or Modem

A picture of a router's back with different ports and power buttons.
White Router

Although you should take into account every possibility that could be causing your AT&T broadband indicator to blink red, it’s recommended to start with the simplest solutions first. Internet connection problems can be caused by a variety of different factors.

Power cycling your gateway or modem should be done first before attempting anything too sophisticated. You’d be surprised at how often a quick power cycle will solve most issues with electronic equipment, even your AT&T broadband.

The system almost always has a minor flaw or defect, which you should be able to fix by taking the following actions:

  1. Shut down your modem or gateway.
  2. Disconnect the device’s power source.
  3. Shut down the device for 60 seconds (at least)
  4. Reconnect it to its power supply.
  5. Use the power button to turn the device on.

When you do this, your gateway or modem will automatically turn back on. The power cycle should resolve any problems that were caused by a minor bug.

5. Update Gateway Firmware

Purple and Grey electronic device full of cords and ports.
Electronic Device

If your gateway hasn’t had an update in a while, buggy software may be a cause of this issue. In such cases, the gateway can suddenly stop being able to connect to the internet.

When you reset your gateway, AT&T updates it automatically, so try that first. Make a note of the firmware version that’s currently installed on your gateway before restarting, though. For this, you can use a PC or a phone with AT&T’s Smart Home Manager.

To check your firmware version:

  1. Using a computer or mobile device, log in to Smart Home Manager.
  2. Choose home network hardware.
  3. Choose Device Details, then your Wi-Fi Gateway.
  4. The firmware version can be seen at the bottom of the page that opens.

After noting your current firmware version, you can force a firmware upgrade using the same software. Here’s how to do it:

  1. Open your device’s web browser.
  2. Open Smart Home Manager and log in.
  3. Select Network.
  4. To locate Home Network Hardware, scroll down.
  5. Choose Restart after selecting your Wi-Fi Gateway.
  6. Confirm the restart.

Cross-check the new firmware’s version number with the one you previously had to see if the modem has been upgraded after the gateway restarts. After the upgrade, see if the red light on the broadband has disappeared.

6. Call AT&T

A customer support employee receiving calls from several customers.
Customer Support

Consider calling AT&T if simple steps like moving the router, turning the modem on and off again, and inspecting the cords don’t solve the problem. Additionally, your internet package might not be working properly; perhaps you forgot to renew it, or your payment failed to process.

In most cases, AT&T can assist you in determining whether there’s a problem with your account. Additionally, AT&T can help you if there is an outage in your area (even if it doesn’t appear on the map) or if there might be a problem with your router or modem.

Moreover, they might be able to help you with some problem-solving tips on how to fix or reset your modem or router. Have it ready before calling them in case they ask for the brand and model of the modem you’re using.

Frequently Asked Questions (FAQs)

What lights on my AT&T router should be on?

Answer: To connect to the internet via Wi-Fi, make sure the power, Wireless, and Broadband lights are all lit up on your AT&T router. The ethernet light needs to be turned on for wired connections.

When should I change my modem?

Answer: In order to keep your network current with technology and compatible with newer hardware standards, you need to upgrade your modem at least every 4 to 5 years.

How can I tell if AT&T is having a problem?

Answer: By contacting AT&T customer care or visiting a third-party website like DownDetector, you can determine whether AT&T services are unavailable.


  • On AT&T Broadband, a red blinking light typically indicates an issue with the power source. It can be a problem with the AC power cord, or your gateway may require an upgrade.
  • You can try restarting the router to fix this, or you could even check for firmware updates.
  • Additionally, the wires themselves might occasionally have an issue; you can inspect them to make sure they are firmly in place.
  • To fix the issue, you might even try factory resetting the gateway.
  • Call AT&T support at 844-413-9929 if you’ve tried these troubleshooting methods and you’re still experiencing problems.

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