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Troubleshoot AC Adapter

Troubleshoot AC Adapter
Figure out how to investigate and resolve AC connector issues, including the following:
  • AC adapter LED is off
  • AC adapter is not charging the battery

The AC adapter, commonly called a laptop charger, is used to provide sufficient power to operate the laptop for extended periods and to recharge the laptop's battery. When the AC adapter fails to work, the laptop battery cannot charge, and the laptop cannot power on or operate unless the battery is sufficiently charged.

If you notice the following AC adapter symptoms:

  • AC adapter is not able to charge the battery.
  • AC adapter is not able to power on the laptop PC.
  • AC adapter LED is off.

The AC adapter cable and power cables may get frayed or cut, and wires may become exposed at either end of the cables. This may be due to the way the cable is wrapped around the AC adapter, or if the cable is subject to undue stress. If the damage is severe enough to expose wires, you should discontinue using the AC adapter. To check the AC adapter, cables, and adapter port on the laptop for any damages.

  1. Unplug the AC adapter from the wall outlet.
  2. Unplug the AC adapter from the PC.
  3. Check the AC adapter and cables (including the power cable) for signs of physical damage or overheating.
  4. Check if the pin inside the plug or adapter port is bent, broken, or damaged.
Warning: Grasp or hold the plug and not the cable while disconnecting the AC adapter from the PC.

Caution: If the AC adapter or cables are damaged, discontinue using the AC adapter immediately.

  1. Unplug the AC adapter from the wall outlet.
  2. Connect another device on the wall outlet to verify if the wall outlet is working correctly.
  3. Try a known-good wall outlet.
  4. Plug the AC adapter directly to the wall outlet.
    Bypass any power regulators like surge protectors, UPS (uninterruptible power supply), power splitters, etc.
Note: If the AC adapter is connected to a docking station, connect the AC adapter directly to the laptop to verify the functionality.

If the wall outlet is working correctly, proceed to the next step.

  1. Unplug the AC adapter from the wall outlet.
  2. Disconnect any external peripherals that are connected to the PC.
  3. Remove the battery. Refer to the User Manual of the PC for instructions on how to remove the battery.
    If the laptop PC has a non-removable battery, skip this step.
  4. Press and hold the Power button for 30 seconds to drain a residual power from the PC.
  5. Connect the battery.
  6. Plug the AC adapter to the PC.
  7. Turn on the PC.

Once the residual power has been drained, if the PC does not power on with the AC adapter, proceed to the next step.


  1. Unplug the AC adapter from the wall outlet.
  2. Unplug the AC adapter from the PC.
  3. Disconnect the power cable from the AC adapter.
  4. Connect the power cable firmly to the AC adapter.
  5. Verify if the LED on AC adapter is on. If no, try a compatible known-good AC adapter.

Once you have disconnected and reconnected the power cable and AC adapter cable, proceed to the next step.

Reset the AC adapter by following these steps:

  1. Unplug the AC adapter from the wall outlet for 15 seconds.
  2. Unplug the AC adapter from the PC.
  3. Plug the AC adapter to a known-good wall outlet.
  4. Plug the AC adapter to the PC.
  5. Check the LED indicator on the AC adapter.
Note: LED indicator may be located either on the AC adapter brick or the adapter (DC) plug.

If the AC adapter LED indicator is on, proceed to the next step.
If the AC adapter LED indicator is off or turns off when connected to the PC, contact us.

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