4 Ways to Fix Router Power Supply Problem

By Puja Chatterjee on September 10, 2023

Router power supply issues will disrupt your internet connectivity and may even disallow access.

In this guide, you will find the simple steps to diagnose and fix these problems.


Why is the Router Having a Power Supply Problem?

A router may experience power supply issues if the power supply is not stable or the power outlet or source is faulty.

Additionally, power supply problems in a router can stem from issues with the following:

How to Fix Router Power Supply Problem?

Ideally, resolving the router power supply issue involves checking the adapter cord, cable, power source, and router components and then changing them if necessary.

Additionally, physically inspect the device to:

If the above steps fail to resolve the power issue, there may be some serious internal problems in the router. In that case, the following troubleshooting solutions are worth trying:

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If the power issue of your router still persists, you may try the following repair options.

Note: Make sure you have the proper tools and knowledge about what you are doing. Any errors may cause serious problems.

Always prioritize safety. Unplug the router from the power outlet before beginning. Also, refer to the user manual to avert possible electrical hazards.

If you are unsure about anything or any step, contact customer support of the manufacturer for further assistance.

Method 1: Reset the Router

Most of the time, resetting the router back to its factory settings may resolve the power supply issue.


Looking for the small Reset button

Paperclip and press and hold

Method 2: Update the Firmware

Sometimes, updating the firmware of the router may resolve a lot of power-related issues.

Note: The interface may vary a bit depending on the model of the router. Usually, the process is more or less the same.


(It is for a TP-Link router in this demonstration).

Alternatively, open the Command Prompt by typing cmd in the search box and hitting Enter. Type ipconfig and hit Enter and look for the Default Gateway.

Typing in the username and password

Clicking on Firmware Upgrade

Please choose hardware version

It is also written at the back or bottom of the router. In this case, it is V3.

Scrolling down to check the Published Date

Firmware Upgrade page

Wait for the process to complete and the system reboots.

Method 3: Identify and Replace the Router Component at Fault

Inspect visually and with a multimeter for electrical continuity to find out the specific hardware component of the router PCB causing the power supply issue. Then replace it with a new one, if any.


Note: Make sure the replacement hardware part is compatible with your model in all respects.

Also, refer to the user manual of your router for proper disassembly instructions or check from online resources.


Opening the rubber caps

Removing the screws

Checking the power supply circuitry

Replacing the faulty component

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Now, plug the router into the power source, turn it on, check the LED indicators, and check whether the router is functioning properly.

Method 4: Check the Adapter and Replace the Faulty Component

The adapter may also cause router power issues while the router may be OK. So, check it to find any faulty components and replace them as well, almost in the same way as above.


(Do not go too deep as that might cut or damage the electronic parts inside.)

Testing the output voltage

adapter label

If the current and voltage specifications do not match the specs mentioned on the label of the adapter, it is considered faulty. Replace the adapter with a new one in that case to resolve the issue.

However, if the specifications match, continue with the following steps:

Swollen capacitor

Now, check whether it is working.


It is essential to resolve router power supply issues for a reliable and steady internet connection.

The steps outlined above in this article will help you in that.