It will be issued Zizi Zi current sound when we using notebook. Such a high-frequency noise is very annoying. We used to solve this problem by replaceing the inverter, or bear it. Also, you can get some true sine wave inverters that have very low distortion, but they are not cheap or efficient. All above are not ideal solutions.
In fact, there is a way can solve this problem but do not have to spend money.
Since the sound is from inverter, we need to determine the sound source. People who has splited off XD of inverter must be aware that there is a step-up transformer in inverter, its working principles just the same as the transformer. We heard the annoying Zizi sound while coils loose.
The sound is not there if we fixed the wire. Now, let’s prepare AB glue and dismantling tools, operate according with the following instruction.
Step one: remove the laptop inverter.
Step two: open the plastic which wraps the step-up transformer.
Step three: paint AB glue to coil 4 circles (careful not to make glue confused everywhere)
Step four: wait 40 minutes for making AB glue solidified.
Step five: repackaging plastic to step-up transformer.
Step six: back the inverter into the laptop
OK, Zizi sound will say goodbye to us.