How to replace laptop power supply?

When your laptop’s power supply starts giving you trouble, it can be frustrating and disruptive to your workflow. Whether your power supply has completely stopped working or you simply need to upgrade to a higher-wattage adapter, replacing a laptop power supply is a task you can easily accomplish on your own. In this article, we will guide you through the process of replacing your laptop power supply, ensuring that you can continue using your device without any interruptions.

What You’ll Need

Before diving into the replacement process, make sure you have the following tools and equipment:

  • New laptop power supply
  • Small screwdriver set

Step-by-Step Guide

Follow these steps to replace your laptop power supply:

  1. Power off and unplug your laptop: Before working on any internal components, shut down your laptop and unplug it from the power source.
  2. Identify your current power supply: Take a close look at your current power supply, noting down its specifications such as voltage and wattage. This information will help you find the correct replacement.
  3. Find a compatible power supply: Use the information from step 2 to search for a compatible power supply online or visit your local electronics store. Ensure that the replacement power supply matches all the specifications of your original one.
  4. Disconnect the old power supply: Locate the power supply connector on your laptop. It is usually located on the rear or side of the device. Gently unplug the connector from your laptop.
  5. Remove the battery: Flip your laptop over and locate the battery release latch or switch. Slide or press it to remove the battery. This step varies depending on the laptop model, so consult your user manual if needed.
  6. Access the power supply compartment: Look for the compartment where the power supply is housed. It is often secured with screws. Use the appropriate screwdriver to remove the screws and open the compartment.
  7. Disconnect internal power connectors: Inside the power supply compartment, locate the connections between the power supply and the laptop’s internal components. Gently unplug these connectors, being careful not to damage any delicate wires or components.
  8. Remove the old power supply: Once all connections are unplugged, carefully pull out the old power supply from its compartment. Set it aside.
  9. Insert the new power supply: Take the new power supply and align it correctly in the compartment. Be sure to match the connectors and inserts properly.
  10. Reconnect internal power connectors: Carefully reconnect the internal power connectors to the new power supply. Ensure a secure connection is established without forcing any connections.
  11. Close and secure the power supply compartment: Put the compartment cover back in place and fasten the screws to secure it.
  12. Reinsert the battery: Slide or press the battery firmly back into its slot until it clicks into place.
  13. Connect the new power supply: Plug the new power supply connector into the appropriate port on your laptop.
  14. Power on your laptop: Finally, turn on your laptop and verify that the new power supply is functioning correctly.

Frequently Asked Questions (FAQs)

Q: Can I replace a laptop power supply with a different brand?

A: While it is generally recommended to replace a power supply with the same brand as your laptop, as long as the specifications match, you can use a power supply from a different brand.

Q: How do I know which power supply is compatible with my laptop?

A: You can find the necessary information on your original power supply or in your laptop’s user manual. Make sure the voltage and wattage match.

Q: Can I replace a higher-wattage power supply?

A: Yes, you can replace your current power supply with a higher-wattage adapter, which may provide better performance. However, avoid using a lower-wattage adapter as it may not supply enough power.

Q: Do I need to remove the battery before replacing the power supply?

A: It is generally recommended to remove the battery as a precautionary measure before working on any internal components.

Q: Can I replace the power supply if I have a sealed laptop?

A: If your laptop has a sealed battery and no accessible power supply compartment, it is best to take it to a professional technician for replacement.

Q: How much does a laptop power supply cost?

A: The cost of a laptop power supply varies depending on the brand, model, and wattage required. It can range from $20 to $100.

Q: Can I repair a faulty power supply instead of replacing it?

A: Repairing a laptop power supply is not recommended, as it can be dangerous if not done properly. It is safer and more efficient to replace it.

Q: How long does a laptop power supply typically last?

A: The lifespan of a laptop power supply varies, but on average, it can last between 2 to 5 years, depending on usage and quality.

Q: What should I do if the new power supply is not working?

A: Double-check all connections and ensure they are properly plugged in. If the issue persists, you may need to contact the manufacturer or seek professional assistance.

Q: Can a faulty power supply damage my laptop?

A: A faulty power supply can potentially damage your laptop if it delivers improper voltage or causes electrical surges. It is essential to replace it promptly to prevent any damage.

Q: Can I use a universal laptop power supply?

A: Yes, universal laptop power supplies can work well as long as they provide the correct voltage and wattage for your specific laptop model.

Q: Can I replace a laptop power supply if the connector is different?

A: If the connector on the new power supply is different from your laptop’s port, you may need to purchase an adapter or a specialized connector cable to make it compatible.


Replacing a laptop power supply is a relatively simple process that can be done by following a few steps. Just make sure to choose a compatible power supply and handle all connections with care. By doing so, you can ensure uninterrupted power supply to your laptop and maintain its optimal functioning.

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