The hard disk will make a certain sound when it is working in response to the high-speed rotation of the motor and the movement of the magnetic head. When the hard disk is frequently read and written (switching on and off, starting programs, defragmentation, anti-virus, etc.) or when you are in a quieter environment, the sound of the hard disk work will be slightly more pronounced this is a normal performance.
The fan will produce a certain amount of sound during operation due to the rotation of the fan and the flow of air, which is a normal phenomenon. The rotation of the fan and the CPU temperature, such as the use of high ambient temperatures, running too many programs or large software will cause the phenomenon of increased CPU temperature, when the CPU temperature increases the fan will rotate more frequently, the sound will also be a little bigger.
Of course, we can't rule out other loud noises, and if the sound is particularly loud, or feel more abnormal, we recommend that you test the official service center to confirm that there are engineers on-site to test the better.