Why does my laptop only charge when turned off?

When a laptop only charges while it’s turned off, the most common reasons are:

1. The charger isn’t supplying enough power while the laptop is running

• If the adapter is too weak, damaged, or not the right one for your laptop, the machine may use nearly all available power just to run, leaving little or none to charge the battery.
• Try the original charger or one with the correct wattage for your model.

2. A software or firmware power-management problem

• Some laptops, especially on Windows, can have battery/ACPI driver or BIOS/UEFI issues that make charging behave incorrectly while the system is on.
• Restart the laptop, check for BIOS/UEFI and chipset updates, and if applicable, reinstall the battery-related device/driver in Device Manager.

3. Heat-related protection

• If the laptop gets too hot while in use, it may reduce or pause charging to protect the battery.
• Clean the vents, make sure the fans are working, and use the laptop on a hard surface.

4. Hardware issues

• A loose or worn charging port, bad cable/adapter, failing battery, or a problem in the laptop’s charging circuitry can cause charging to work only when the laptop is off.
• If the plug feels loose or charging is intermittent, the port or internal hardware may need service.

If the charger and battery are known good and the problem still happens, hardware becomes more likely than a simple setting issue.

One caveat: exact behavior can vary by laptop model, so if you tell me the brand and model, I can help narrow down the most likely cause.