Laptop power adapter always has a sound through the sound
How long has the computer bought, the adapter has this sound is not normal. If the warranty period to change it.
This has a security risk, hurry to change.
Power adapter sound is absolutely abnormal sound, if there is an accident on the cup.
Or do you change the adapter? No hidden trouble. Looks like your adapter has a problem. The other seems to be fine
It is recommended to the computer market to buy a voltage and current and interface the same domestic adapter, a lot of computer city, the price of 45 yuan. If you do not replace your adapter in time will affect your battery life
The current sound of the power adapter is mainly caused by the failure of the electronic components in the power adapter. Now the power adapter program is a switching power supply program, the internal working principle is: first AC input filter processing, and then rectify and rectify the DC filter. DC through the switch tube high-speed ON / OFF processing into the switching transformer output high-frequency AC, as long as the control switch ON / OFF duty cycle can get different high-frequency AC. High-frequency AC rectifier filter to get the pure DC input notebook we need. In this program on the power supply requirements are relatively wide (AC100-240V), the output of the DC adjustable range, steady flow ability, is a more reliable power converter program.
The electrolytic capacitor and the inductor in the power adapter are more prone to squeaky sound from the human ear, and in the event of a serious blow.
It is recommended that you replace this power immediately, if you continue to use will damage your notebook hardware, when the loss of large.
The fluctuation of the power supply in a certain range generally does not affect the stable output of the DC, nor does it sound a sound, unless the power adapter's filter and steady flow components fail to feed the internal clutter of the power adapter back to the grid, The same socket on the lamp and other electrical equipment.
