You are my last hope: /
My laptop has been making strange noises and chirping or whistling for 2 days, but only when the laptop is connected to the socket.
3 factors
Battery out, plug in power cable, everything is ok
Battery in, cable out, everything ok
Put in the battery and plug in the power cable, the chirping or whistling starts…
I have already dismantled the entire laptop and cleaned it completely or all components checked everything in time
Everything rebuilt and it's still there
As long as I connect the power cable and start the laptop it starts to chirp or whistle and that nonstop
It's a really annoying sound that causes a headache within 1 minute
I haven't found anything on the Internet, I think I'm the first
And no, the microphone is not in listening status
I also dismantled the speakers, nothing helps
It comes from the motherboard. I don't know what to do anymore
What could be the reason or how could I fix it, please help
Power packs that reduce the voltage from 230V to 12V can quickly generate noises such as humming or whistling when they reach a certain level of performance. However, that does not mean that they are harmed.
Otherwise there are also voltage converter coils on the mainboard which can whistle under a certain load on the computer.
Unfortunately, there's relatively little that can be done about it.
You can try plastic spray paint or a non-conductive glue. With a little luck, the spool will remain sufficiently fixed.
Thank you. I'll buy a new power supply unit on Monday and try it out
Why do you first dismantle a device to clean it… And risk a total loss if you only ask your question afterwards? It makes sense to ask what it can be before you, without much experience, dismantle a laptop. Often screws are left over from such actions or something breaks when dismantling, which can ultimately lead to a total loss. These highly complex devices should only be disassembled as a last resort or when it is definitely certain that you have to go in (for example loose charging socket!).
Switching power supplies all whistle; some a little louder, some a little quieter and some only start after a certain amount of time. You have a coil whistling on the mainboard… Which it has only just started with time. But if there are no other malfunctions, then that's the way it is. Exchanging a motherboard for around 500 euro would be completely unnecessary.
The power supply unit in the laptop supplies the device with different required voltages. It does this using the appropriate frequencies with which it controls the transmitter coils. This activation frequency leads to the fact that the transformer starts to whistle at this frequency. The more solid it is, the less you can hear it… Or stop over time. However, the whistling is a completely normal process and the noise comes from when the power supply unit provides the charging current for the battery.
