Blue Light On the Router But No Internet

Blue Light On the Router But No Internet

When you notice a blue light blinking on your router, it signifies that your internet connection is undergoing restoration. When the blinking stops and the light remains consistent, it indicates that your connection has been successfully restored. However, sometimes the router shows a blue light, yet your internet isn’t working. What could be the cause of this?

Such occurrences might result from technical errors like a broken cable or issues with drivers, DNS, IP addresses, etc. The easiest way to fix it is to thoroughly check all the cables to ensure none are damaged and simply restart your router and modem. 

In this article, we’ll explain why your internet is not working and what are the solutions to get the internet back. Let’s get started.

Blue Light On Modem But No Internet: Why?

To better understand why your internet may not be working, we first need to explain how the modem operates and what the purpose of each light is. 

Typically, your modem displays six types of lights:

WAN Light:

This light indicates a good connection with your node, implying that your modem is effectively receiving internet signals from outside.

Internet Light:

This light signifies that your ISP settings are perfect and your modem is working as it should.

WiFi Light:

This light indicates that your modem is emitting WiFi signals. However, it doesn’t necessarily mean your internet is working.

Ethernet Light:

This light is visible only when you have an ethernet cable connected to the yellow port of your modem.

Power Light:

When this light is on, it simply means your modem is successfully getting power from the source.

Phone Light:

If this light is present on your modem, it means your phone lines are functioning through your modem.

If your internet is functioning despite the blue light showing on your modem, the possible causes could include:

  • A broken cable or improper connection
  • Incorrect router or modem settings
  • Faulty router
  • Problems with the DNS cache
  • Outdated wireless modes
  • Problems with IP address
  • System outages

How To Fix It When Blue Light On Modem But No Internet?

Now that you’re aware of what could potentially cause your internet to malfunction, let’s discuss various solutions to fix the issue.

How To Fix It When Blue Light On Modem But No Internet?

1. Check Your Router and Modem 

The first step is to examine your router and modem to identify what’s causing the problem. An easy way to figure this out is by connecting a different device to your WiFi. If that device can use the internet, then there’s something wrong with your own modem. But, if that device also can’t access the internet, your router might be the issue.

Begin with a power cycle for your router and modem, i.e. restart them. This clears the cache, refreshes the RAM, and could fix any software or network-related issues. However, be mindful that your credentials or settings may be lost as a result.

2. Fix Your Connection Cables 

We hope that the first step will resolve your issue. But if your internet is still not working, you need to check your cables. Make sure they are not broken or improperly connected. Especially, ensure that your Ethernet and coaxial cables are connected to the device well in their respective ports.

Moreover, check the snap pins on the cables, as they keep your internet connection stable and secure. If they’re bent or damaged, your internet might stop working. In the end, the simplest action you can take is to disconnect all the cables and then plug them in again.

3. Clear The DNS Cache 

The DNS cache is where your searches are stored. Sometimes it might get infected with viruses, unauthorized domains, or malicious codes from other sites that corrupt it, leading to your internet shutting down. 

The easiest solution is to clear this cache. To do this, press Windows+R, type ‘cmd’, then in the command prompt, copy ‘ipconfig/flushdns’ and press enter. This will clear the entire cache.

4. Change Your IP Address 

There could be blue light on the modem but no internet if the same IP address is being used on multiple devices. If this is the case, your devices won’t connect to the internet. 

The solution is to choose a new IP address for your device. If your internet still doesn’t work, then contact the manufacturer and downgrade the firmware.

5. Check For System Outage 

You can check a system outage by going to the manufacturer’s website or giving their customer service a call. Getting updates from them can help restore your connection. If there’s no outage in your area, then there might be no better way than fixing your router.

6. Contact Customer Care Service

If you’ve tried everything and still can’t solve the problem, reach out to your internet provider or customer care. Their expert technicians will surely suggest a solution. If you still can’t find a solution, it might be time to get a new router or modem.


The blue light on the modem but no internet is a common internet issue that many of you might have faced. There could be several reasons for this issue, ranging from improper connections or settings, issues with the DNS cache, and IP address conflicts to system outages. To address these problems, start by checking your router and connection cables, clearing the DNS cache, ensuring proper IP address, and checking for system outages. It may seem daunting, but these steps will help you troubleshoot and fix your internet connectivity issues.

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