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The Green Light on Your AC Adapter Turning Off When You Plug It In Laptop? Here’s How to Fix It!

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A laptop charger, also known as an AC adapter, powers a laptop to enable it to operate for prolonged periods. It also recharges the laptop battery when it runs out. Therefore, the battery doesn’t charge when your AC adapter fails, and your Laptop may not turn on or even function.

When your laptop charger’s green light goes off, it shows that your machine is disconnected from the power supply. In addition, your Laptop’s AC adapter can experience various problems, causing it to malfunction or fail to work properly.

Common AC adapter problems include the laptop charger:

  • Not turning on the Laptop
  • Not charging the battery
  • The AC adapter’s LED turning off
  • The LED turns off when connected to the Laptop, and the
  • Error “The AC adapter type cannot be determined,” reducing your computer’s performance.

Causes of Laptop Charger Not Working When Plugged In

The Green Light on Your AC Adapter Turning Off When You Plug It In Laptop - Causes of Laptop Charger Not Working When Plugged In
Common Issues With AC Adapters

The AC adapter can encounter various issues due to any of the following:

  • Damage to the AC adapter or power cable
  • Faulty AC adapter
  • Faulty DC-in connector on the PC
  • A faulty power cable, etc.

How to Troubleshoot Computer Power Supply Light Turns Off

If your Laptop’s AC adapter malfunctions or isn’t working properly, consider the following options to troubleshoot the problem:

1) Assess the AC Adapter Plugged Into the Power Outlet

  • Plug the AC adapter into the power outlet securely and firmly to ensure that it’s not loosely plugged in to the wall outlet. When the laptop charger is plugged in loosely, the adapter may appear to be faulty, yet it may not be receiving power from the outlet. 
  • Disconnect the laptop charge and reconnect it to the power outlet to ensure it’s plugged in properly.

2) Check the Indicator Light on the AC Adapter

  • Laptop chargers feature power indicator lights, either blue or green, to show when power is flowing through the AC adapter.
  • The indicator lights up when the adapter is working properly, indicating that it’s receiving power. The converse is also true.

3) Verify the Power Outlet

  • Some power outlets feature a light switch to be active or in the “On” state. This power outlet is found in modern apartments, houses, and condos. Check the power outlet to ensure it’s generally functional if the light is active.
  • Measure the power output using a voltmeter and assess the outlet for functionality. You can also plug the AC adapter into another power outlet to determine if the problem is with the charger or the initial outlet. Finally, don’t forget to check the circuit breaker to ensure that it’s turned on and hasn’t tripped.

4) Assess the AC Adapter’s Brick Connection

  • Laptop chargers usually come in two separate pieces connected at the brick, the rectangular box component, to form a single cable.
  • First, check the connection to ensure it’s secure and firm – disconnect the cables and reconnect them to check if it’s working or not.

5) Check if the Adapter is Properly Plugged into the Laptop

  • The connection between the AC adapter and the Laptop can easily disconnect, causing the charger’s green light to turn off. Instead, firmly attach the metal end of the adapter cable to the Laptop to ensure it receives power from the charger.
  • Check the metal pin on the cable’s tip for breakage or bends that may prevent power from flowing through the AC adapter into the Laptop. Broken or bent laptop chargers can hamper the power flow from the outlet to the laptop battery.

6) Check the Laptop’s Power Connection Port

  • The AC adapter’s metal pin connects to the Laptop’s motherboard via a single solder point or more. Therefore, power may not flow from the AC adapter to the Laptop when a solder point breaks off the motherboard or gets damaged.
  • You may have to solder the broken or defective power connector back onto the motherboard or replace it to troubleshoot this problem. If soldering the connector doesn’t solve the problem, the power board or motherboard may need replacement.
  • Find a professional to easily fix this problem because soldering components may require technical skills and tools.

7) Replace the Damaged AC Adapter

  • A laptop charger that has failed or isn’t working properly requires immediate replacement to continue charging your Laptop and using it. Contact your device manufacturer or visit its official website for a genuine AC adapter.
  • Alternatively, visit an online electronics retailer or a local shop to get a universal laptop charger or AC adapter. Consider Targus AC adapters designed for use with various laptop models and brands. The high-quality laptop chargers match different laptops in terms of amperage and voltage.
  • Check your Laptop’s package for information on AC adapter compatibility. Then, select a charger that’s compatible with your Laptop’s model and brand.


Green lights on an AC adapter turn off when I plug into a laptop, indicating there is no power for your Laptop to charge. Despite the reason your Laptop’s charger may fail, you can repair or replace it for continued use of your Laptop. We hope you found this article helpful in troubleshooting your charger or AC adapter problems.


Why Does My Charger Turn Off When I Plug My Laptop Charger In?

If your computer’s power supply light turns off immediately after plugging the charger into your Laptop, the cable has likely malfunctioned. A battery that ceases to hold a charge or stops working can result in your Laptop shutting down immediately after unplugging the charger from the power outlet.

What Does a Green Light On a Laptop Mean?

The blue or green light on the AC adapter shows power flowing through the power outlet. Turn off the main power from the main switch or unplug the AC adapter to troubleshoot the problem. An AC adapter’s light indicator issues include a fault and may experience immediate blinking or failure to turn on.

Why Is My AC Adapter Not Charging My Laptop?

Your AC adapter can fail to charge your battery due to a loose, damaged, or unplugged charging cable. Dust the charging port to remove dust and dirt build-up over the years to improve performance and enable it to power on effectively,

Why AC Adapters May Stop Functioning?

A faulty AC adapter, damage to the power cable, a defective power cable, and a faulty DC-in connector on the Laptop may cause your Laptop’s charger to stop working.

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Pigtou Editorial Team

A group of tech enthusiasts who find pleasure in troubleshooting and resolving various issues. When we're not engaged in writing, we typically enjoy playing table football or spending time with our office dog.
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