1. Check to make sure that your laptop and any peripherals are securely plugged into the power outlet.
2. Make sure that the laptop fan is running at an adequate speed and the laptop is not overheating.
3. Verify if the noise persists after unplugging any external devices from the laptop.
4. Check if the noise is coming from any additional components such as a hard drive or optical drive.
5. Ensure that the noise is not coming from the speakers or any audio components on the laptop.
6. Contact the manufacturer of the laptop for further troubleshooting or to schedule a service appointment.