Ideapad S400u - Noise coming out from the headphone jack

I also have this annoying noise coming out from my headphone.
It happens while the notebook is charging/plugged.
Could anyone help me?
My lenovo is Ideapad S400u - Windowns 8.1 - 64 bits.
Thank you,

Igor,
Welcome to the forum!
Can you describe this noise? Is it coming from the area around the headphone port? If you plug headphones into the port, does the noise go away or change? Is the outlet you are using for charging grounded?
Thanks
Mark
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
Program Manager, Lenovo Social Media (Services)
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AndyBrandt wrote:
Did reset as described (switch off, remove power sources, hold power button for 5 seconds, power on) - this brought back the familiar sound when the computer powers on (was silent previously, though I didn't notice it) but the headphone effect persist.
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Ideapad S400u - Noise coming out from the headphone jack

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