Here are some steps you can take to determine the issue:

1. Check if your laptop is plugged into a power source and make sure the power cord is properly connected.
2. Check the power outlet and associated power cord for any signs of damage.
3. Check if the laptop is charging by looking at its power indicator.
4. Check the settings and make sure that power-saving features like hibernation or sleep mode are disabled.
5. Replace the laptop’s battery if it is no longer charging.