Disabling this Alert in BIOS “Alert! The AC Power adapter wattage and type cannot be determined”

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The full error message reads: “The AC power adapter type cannot be determined. Your system will operate slower and battery will not charge. This problem might be solved by: *Ensure the plug is inserted completely for best system operation. *Connect a Dell 130W AC adapter or higher.”

There is likely a bad wire in the charger and it needs to be replaced. Sometimes the wire will make contact if the charger is in a specific orientation. Basically, play around with it by moving it to an orientation, let it sit for 5-10 sec to see if the charging light comes on, if not rotate, play with wire position, repeat. This has happened to me several times and I dick with it until it works and then remember how it was positioned for the next time.

How to Fix the AC Power Adapter Type Cannot Be Determined?

In this section, we will show you how to fix the error that AC power adapter type cannot be determined.

Power Cycle PC

In order to fix the issue that the AC Power adapter type cannot be determined, you can choose to power cycle your PC.

Now, here is the tutorial.

  1. Remove all external peripherals (flash drives, printers, external hard drives) from your computer.
  2. Unplug your charger, turn off your laptop and remove the battery.
  3. Hold down the power button for at least 30 seconds.
  4. Then put the battery back in, charge it again and boot the computer.

After that, check whether the error that the AC power adapter type cannot be determined is fixed.

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Change the Adapter

In order to fix the issue that the AC power adapter type cannot be determined, you can check whether there is a problem with your adapter. To do that, you can check whether the adapter works on another computer or another adapter works on your PC. If yes, it proves that your own adapter is abnormal and you need to change it.

If you are sure that your adapter is okay, then the problem could be anywhere. For example, it could be caused by the loose soldering in the charger brick, a broken pin, fired capacitors, or a broken connection, and so on.

In these situations, in order to fix this problem, you need to change a new adapter.

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Disable Power Warnings

If you are able to charge your computer normally, but you often receive the error message that the AC power adapter type cannot be determined, you can choose to disable the power warnings. But you need to pay attention to that this action does not mean that the error message is removed.

Now, here is the tutorial.

  1. Reboot your computer and press the hotkey once you see the logo appears to enter BIOS.
  2. Once in BIOS, navigate to the Advanced tab and then go to the option of Adapter warnings.
  3. Next, choose Disable.
  4. Save changes and exit the BIOS.

Once all steps are finished, reboot your computer and check whether the issue that the AC power adapter type cannot be determined is popping up when charging the computer.

To sum up, in order to remove the error that the AC power adapter type cannot be determined, this post has shown some solutions. If you come across the same error, try these solutions. If you have any better idea to fix it, you can share it in the comment zone.

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