When your hard disk is frequently read and written (startup/shutdown, startup program, defragmentation, antivirus, etc.). ) or if your hard disk is in a quiet environment, the sound will be slightly obvious when working. It should be convenient to observe the synchronization of noise and hard disk indicator light, which is a normal performance.
It is normal that the fan of the notebook will produce a certain sound due to the rotation of the fan and the airflow when working.
The rotation of the fan is related to the temperature of the CPU. If the ambient temperature is high, running too many programs or large software will cause the CPU temperature to rise. When the CPU temperature rises, the fan will rotate more frequently and the sound will be louder.
If the noise is particularly loud, or you feel abnormal, I suggest you go to the nearest official service center to check and confirm it, because the specific noise cannot be confirmed online, so let the engineer check it on the spot.