What To Do If CenturyLink DSL Internet Is Not Working – Troubleshoot Tips

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DSL connection is mostly loved by the tech geeks because of its uninterrupted service and consistent speed. But sometimes the signal loss issues, or no internet connection error is also observed in DSL connection of many ISPs.

I bet you are using CenturyLink DSL internet but it’s not working properly, and that’s what brought you here. Right?

Well, Your CenturyLink DSL internet may not be working for a variety of reasons. When your CenturyLink DSL internet is not working, it can be hard to figure out what and where exactly the problem is. There are a lot of things that could be causing this issue, so let’s go over some troubleshooting tips you can use if your internet service provider says there’s nothing wrong with their end.

Firstly, ensure that all the cables are plugged in correctly and the modem is turned on. If that doesn’t work, you may need to reset your modem by unplugging it for 30 seconds and plugging it back in. You can also check the DSL light on the modem to see if it is lit up. If it is not, then that means there is no internet connection, and you will need a technician to get your modem fixed.

Also Read:  DSL Modem vs Cable Modem

Reasons For No Internet Connection In CenturyLink DSL Service

Following are the three most common reasons if you are a CenturyLink user but not getting the internet connection in your DSL:

1. Hardware failure

You can try the troubleshooting tips first such as checking the ethernet cables and power cables of the modem and router. But if that doesn’t work try restarting the modem and router and you might get the internet back.

Still Negative? Well, your devices may need to be replaced as the last solution. You can contact CenturyLink support to get you the new one or can simply buy them on your own.

2. Service outage

This happens when there is a problem with the service in your area. In this case, you don’t have a bunch of cards to play, rather you just need to wait for a couple of hours and let the CenturyLink professionals do their job.

CenturyLink always delivers its best to maintain the internet server and get your internet connection back as soon the server is fixed.

3. Service Suspension

You may have missed your recent payments and your internet services are suspended due to an overdue bill. Go to your CenturyLink account and check if you have an active subscription? If not, clear your payables instantly to get back your internet access.

Also Read: List Of Best Mediacom Compatible Modems Review

Ways To Resolve No Internet issue in CenturyLink Internet Connection

1. Reboot and Reset the Modem

The most likely issue seems to be with your modem. Make sure that all of the cables are plugged in correctly and the power button is turned on. Give your modem a quick reboot by removing the power adapter for 2 minutes and plugging it back.

Still no connection? Try to give your modem a hard restart by pressing the little hole button present at the back of your modem using a toothpick or sim card ejector, it may help you get the internet back up and running if nothing else does!

2. Update the Firmware/Software of your CenturyLink DSL Modem

If you are having problems with your CenturyLink DSL service, one possible solution may be to update the firmware/software on your modem. You can do this by following these steps:

  1. Go to the CenturyLink website and sign into your account.
  2. Click on the “My Services” tab and then select “Manage My Modem.”
  3. Under the “Modem Firmware” section, you will see a list of all the modems that are associated with your account. Select the modem that you are using and then click on the “Update Firmware” button.
  4. A new window will open, and you will be asked to download the latest firmware for your modem. Once the download is complete, follow the instructions on the screen to install the update.
  5. After the firmware/software has been updated, restart your modem, and then try using your DSL service again.

Also Read: Best Armstrong Approved Modems Review

3. Replace the cracked/broken DSL Lines

If your CenturyLink DSL cable line is cracked or broken, you will likely need a technician to come out and repair the line. This can be a costly repair, so it is important to make sure that the line is damaged before you call for a technician.

You also need to trace down the specific patch of the line which is visibly damaged, it will need to be replaced.

Once the line repair and replacement are made, you should be able to use your DSL service again without any issues.

4. Check Faulty and Damaged Cables

You need to check if all the cables are plugged in properly. If they are not, plug them back in and ensure that they are snug.

Next, you need to check if the modem is turned on. If it’s not, turn it on and wait a minute or two for it to connect to the internet.

The issue can also be with your modem. Make sure that the ethernet cable plugged at the end of the modem and router is not damaged. Sometimes, the real culprit in stealing the internet is an ethernet cable. You can check it by replacing it with a new ethernet cable

If the modem is on, no cable is damaged, and all the cables are plugged in properly but the internet still isn’t working, you may need to reset the modem. To do this, you can follow the above-mentioned steps in the article.

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5. Replace the Filter if distortion is detected

Every DSL internet user knows that simultaneously using the internet and landline phone is not possible without placing a filter in between. It’s the two-ended little mechanical device that is placed between your modem/phone and the DSL connection port line.

Even if you are not using the phone, plugging in the DSL line into the modem without using the filter may give a distorted internet connection.

You need to check the beep in the phone’s receiver and ensure that it’s not giving a humming bee sound and distorted tone. If it does, congratulations! problem is detected, your filter is damaged.

Simply get yourself a new filter and replace it because it’s the thing that is slowing down your internet and breaking up everything.

6. Replace the faulty Phone Jack

Is your phone jack alright and nothing is faulty there? Not sure? Let’s give it a thorough inspection. Because a faulty phone jack can sometimes be the throne in your rose.

You need to make sure that there is an active internet line in that phone jack. If you see any issue in your current phone jack, just try to either replace it or plug your cables in any other phone jack in your home after making sure that the other one has an active internet connection and it’s working perfectly.

Related Post: Top 5 Best Modems With Phone Jacks – Self Tested Picks

7. Update The Browser

What if I tell you that your internet connection is all set and there is no issue with any physical equipment? Would you mind believing it?

Well, I bet most of the users can’t even think of this issue if it really happens. Your browser may have gotten outdated and its old algorithms can no longer process the internet data bytes.

You simply need to update the version of your current browser or install the new one somehow.

8. Configure Internet Settings

Another reason for no internet connection on your CenturyLink internet can be the misconfiguration of the Wi-Fi Network Adapter or Ethernet Network Adapter settings. You need to make the settings according to your service provided and have to put the correct details there for the following fields

  1. IP Address:
  2. Subnet Mask:
  3. Default Gateway:
  4. Preferred DNS Server:

Make sure to use the correct IP version (IPV4 or IPV6) depending upon the type of connection and services you are getting from CenturyLink

If you have any given IP Address, Default Gateway, Preferred DNS, and Subnet Mask settings make sure to put it there, otherwise, select the “Obtain an IP address automatically” field.

After ensuring these things and making the settings right, your DSL internet should work.

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9. Inspect the CenturyLink Customer Support

What if your ISP is not flowing the stream of the internet towards your modem? Yes, that’s a likely thing to happen. Once you are assured of none of the above-mentioned troubleshooting tips worked and everything is perfect at your end, it’s time to make a quick call to CenturyLink and ask them for quick assistance.

They will surely figure out the reason why ain’t your CenturyLink DSL modem getting the internet connection supply in the first place and resolve it accordingly.

Fix CenturyLink DSL Internet Connection By Troubleshooting Modem Lights

When your internet connection is halted, you must have observed that something is wrong with your modem lights. There should be a bunch of blinking lights and all of them would be blinking in an inappropriate way other than the usual pattern they blink in.

To identify what exactly the issue is with your internet, let’s have a look at how to diagnose the CenturyLink DSL modem lights and make the fixes accordingly.

Red or Amber Color of Modem

The first light which you see in any modem is usually the power light. By default, the light should be in Green color under normal circumstances. But if you don’t see the green stable light then are some of the possible causes for that.

Upon inserting the power cable to the back of your CenturyLink modem, if you see a Red of Amber color light in the place of the green power light, it means that the modem is currently testing its hardware or firmware. It should not stay in this color state any longer than 2 minutes.

But even after 2 minutes of troublesome wait light didn’t turn green? Well, there must be some possible issues which you need to make sure that they are not.

  • First of all, check if you have attached the original or recommended power adapter with your modem. Make sure to use the adapter which has suggested voltage, power, and amperes. Because if any of these specs are not in line with the provided information, simply replace your power adapter.
  • The other reason can be the overheating issue of the modem due to which it’s not turning itself in the working mode. Try to keep the modem out of the direct sunlight contact and install a little PC power supply-sized fan behind your modem to keep it cool.
  • Check if the power cable of the adapter is damaged from anywhere, replace your power adapter in this case as well. Also, you might be having a less voltage supply in the power outlet so make a little test of plugging the adapter in any other power socket.

After checking the modem in accordance with the above-mentioned steps and taking necessary measures, your CenturyLink modem power light should turn itself from red/amber to the stable green light.

The Problem of No DSL Light

No color is visible in the DSL light space and there is a blackout situation? Well, It can be due to multiple issues depending upon the situation.

If your DSL light turns off after a few seconds of the power light going into the green stable state, shows that your modem is having a hard time detecting the internet network connection.

The probable cause of not getting any DSL light in the modem can be that there is no cable connected to the back of the modem, or even if it is already plugged, it is unable to transmit the signals properly.

To resolve this, the best way is to confirm if your line is already plugged in and the internet is not down by your service provider. If the problem persists simply reset your modem and let it light up the DSL light.

Another thing that you can try is to replace your DSL/Ethernet cable because it can be faulty as well.

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Internet Light

In between all the lights, there is always one light with an “Earth” icon or the word “internet” written on it. This light must always be green in color. If it is giving any other color like red or amber, it means there is a breakout of internet connection in your area or by your service provider.

It can also be due to misconfiguration of the internet settings of your modem and router. Make sure that you are using all the given settings provided and suggested by CenturyLink.

You can simply override the settings with the correct one and now your internet light should turn into green color.

Flashing Green Light

Another common issue is a flashing green light. This usually means that the modem is trying to connect but is having trouble doing so. If this happens, you can try unplugging the modem for 30 seconds and then plugging it back in. You can also check to see if your phone line is working by dialing *67 and seeing if you get a busy signal.

No lights are visible on your CenturyLink Modem

The most anonymous fault to witness is when there is not even a single stable or blinking light on your modem and it’s giving a glimpse of a dead body buried in the graveyard having no life signs.

Well, you can still check the power cable, cords, power button, and power outlet and make sure that everything is working the way it should be. No faults detected anywhere. Then probably your modem is all dead and needs to be replaced.

In this case, you can call CenturyLink support to get a new modem or can buy your own modem after making sure that it’s added to the compatible modem list of CenturyLink-approved modems.

Also Read: Best Routers For Fiber Optic Internet – Detailed Review


Well, here you go, now that you have walked through all the possible issues which can make your CenturyLink DSL modem misfunction. If you’re experiencing any of these common CenturyLink DSL internet connection problems, just follow our mentioned troubleshooting tips and also the DSL modem light meaning guide. You are all set to fix it up

Frequently Asked Questions (FAQs)

My modem is not working at all, what should I do?
If your modem is not functioning, try shutting it off for a few seconds and then turning it back on. You may also check if you receive a busy signal and your phone line is operational. If the problem persists, your modem may need to be replaced.
My DSL light is not lit up, what should I do?
If the DSL light on your modem is not illuminated, it usually indicates that there is no power supply to the modem. You need to restart the modem and plug it into a different power outlet. If that doesn’t work, you may need to contact your ISP.
I can't get my internet light to turn green, what should I do?
If the internet light is not green, it indicates that there has been a disruption in your area’s or service provider’s connection. Try changing the settings back to what they were intended to be and see whether that solves the problem. If not, you may need to contact your ISP.
My modem is giving me a flashing green light, what does that mean?
A flashing green light usually means that the modem is trying to connect but is having trouble doing so. it also means that there is something wrong with the ethernet cable or maybe your phone jack so try to replace them if nothing else works.
How to tell if DSL light is not working?
You can check to make sure that the power cord is plugged in and that the outlet is working. If the DSL light is not lit up at all, it usually means that there is no power to the modem. However, having power in your modem but the DSL light staying off means there is a problem with the internet connection supply and you need to contact your ISP to resolve it.

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