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HP Notebook PCs - Using and troubleshooting the AC adapter

Correct use and storage of your AC adapter ensures best performance when recharging or powering the notebook.

If the AC adapter does not recharge the battery or power the notebook, troubleshoot the adapter, and if necessary purchase a replacement.

Troubleshooting the AC adapter

If your notebook exhibits any of the following symptoms, test your AC adapter using the steps below to verify that the AC adapter is working properly.

  • When the notebook is connected to the AC adapter, the notebook does not turn on and lights or LEDs do not illuminate.

  • When the notebook is connected to the AC adapter, the display does not turn on.

  • When the notebook is connected to the AC adapter, the battery does not charge.


The AC adapter might shut down and remain without output due to conditions that can trigger overcurrent, overtemperature, and short circuit. To recover the AC adapter output, unplug the AC adapter from the notebook for five minutes, and then plug it back in.

Use the AC adapter that shipped with the laptop

For best performance, use only the AC adapter that came with your HP notebook computer.

The wattage information is printed on a label located on the bottom of the AC adapter.

Locate power adapter wattage information

If you use an AC adapter that has a lower wattage than your notebook requires, you might see the following trade-offs:

  • The CPU clock rate might be reduced to save power, which can cause programs to run slower.

  • The battery might charge more slowly, or not at all.

  • The AC adapter itself might become warm to the touch.

Look for physical damage on the AC adapter

Examine the AC adapter, cords, and computer for damage.

  1. Unplug the power cord from the AC wall outlet.

  2. Disconnect the DC connecter from the computer.

  3. Check the AC adapter label to ensure it is labeled with the HP logo.

    HP logo on the AC adapter
  4. Check the AC adapter and cords for cracks, melted plastic, burn marks, or other signs of overheating.

    Chipped and cracked AC adapter and damaged cord
  5. Make sure the DC adapter cord connector tip is not bent, or broken.

    Examples of broken connectors
  6. Check the inside of the DC connector to make sure the pin is straight and not missing.

    Examples of damaged barrel connectors

    Examples of bent or missing ID pins

    Example of undamaged USB Type-C connector

    Undamaged USB Type-C connector
  7. Make sure there are no obstructions or foreign material inside the power port on the computer, and that the center pin is straight.

    Power port on the computer
  8. If the AC adapter, connectors, or cords are damaged, do not use the AC adapter. You can purchase a replacement AC adapter from HP.

Power reset a notebook with a non-removable battery

Perform a power reset (or hard reset) of your notebook to clear information from the computer memory without erasing personal data.

  1. Turn off the computer.

  2. Disconnect the AC adapter.

  3. Remove any discs from the disc drive.

  4. Remove memory cards from the card reader slot.

  5. Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.

  6. With the AC adapter unplugged, press and hold the power button for approximately 15 seconds.

  7. Reconnect the AC adapter, and then turn on the computer.

Make sure that the notebook is receiving power

Check the wall outlet, AC adapter, and notebook for signs that the system is receiving power.

  1. Disconnect the AC adapter from the wall outlet.

  2. Test the wall outlet by plugging in a small lamp or other device that you know is working.

    If the wall outlet is not providing power, test the lamp or other device on different wall outlets until you find a working wall outlet to use.

  3. Make sure that the AC adapter cords are securely connected to the AC adapter and the notebook.

  4. Reconnect the AC adapter to the wall outlet, and then confirm that the light on the AC adapter is on. If the light is not on, there might be a problem with the AC adapter.


    Some AC adapters do not have a light indicator.

  5. Check the power port on the computer to make sure that the light is on. If the light is not on, the AC adapter might not be working correctly or the notebook system board might be damaged. Contact HP Customer Support for further assistance.

    Battery light on AC adapter port
  6. If you have a power cord that you know works, try using that power cord with your AC adapter. If it works, the power cord needs to be replaced and not your AC adapter.

  7. Locate the Windows battery icon.


    Windows displays a battery charging activity icon in the system tray. You can find this icon on the Windows desktop, next to the time and date.

    • If the battery charging icon is displayed, the AC adapter is working correctly and powering the notebook.

      Battery charging icon
    • If the battery power meter icon is displayed, the AC adapter is not working correctly, and needs to be replaced.

      Battery meter icon

Test the AC adapter with the HP PC Hardware Diagnostics UEFI tool

Use the HP PC Hardware Diagnostics UEFI tool to identify AC adapter issues.

If the app is not installed on your computer, download the latest version from the HP Hardware Diagnostics website.

  1. Hold the power button for at least five seconds to turn off the computer.

  2. Turn on the computer and immediately press esc repeatedly, about once every second. When the menu is displayed, press the f2 key.

  3. On the Main Menu, select Component Tests.

    Your Component Tests menu might be different, depending on the components installed on your computer.

    Component Tests menu
  4. On the Component Tests menu, click Power, click AC Adapter Test, and then click Run once. The AC Adapter Test begins.

    When the test is complete, the screen displays the results.

  5. If the AC adapter fails a test, click Troubleshoot.

  6. Follow the on-screen instructions to attempt to resolve the problem, and then click Yes.

  7. If the problem is not resolved, click Yes to contact HP Customer Support.

  8. Scan the QR Code, or write down or copy the failure ID (24-digit code) and product ID for when you contact HP Customer Support. The information is also available in Test Logs on the main menu.

  9. If your computer is online, click NEXT to go to the HP Customer Support website.

Using and understanding AC adapters

Using an AC adapter not designed for your computer can cause issues with your computer.