My laptop's power adapter always has a sound what's going on?
If you are plugged in a separate power supply notebook will not sound
It is the sound of the current, basically have, do not care
Aging may have a current sound, or bad contact may have, look at is not bad contact
There is a weak current sound is a normal phenomenon, if the sound is relatively large, that is, inverter device out of the question, if at the same time can smell the smell, that is somewhere the circuit may soon be breakdown.
The slightest voice of my also can ignore. The The The The In fact, when the phone can also be charged when the universal charger will issue such a slight sound
The laptop's power adapter always has the sound for the following reasons:
1, because the power adapter switch is working at high frequencies, the transformer coil through the high-frequency current when the electromagnetic sound will be generated, if the coil is loose, then the sound will be larger, there is the ferrite skeleton Of the joint if the gap is large or loose will lead to increased sound.
2, if there is insulation inside the discharge there will be a sound, encountered this situation in time to replace it.
3, in the use of as much as possible lightly to prevent the inside of the core and coil loose, to ensure safety.
