Tecra A3 106 Noise on Audio Output while Charging

Hello all,
My Tecra A3 generates an annoying noise on line out/headphone output while charging the battery.
when it's unplugged, the noise goes off.
Is that normal?
Thanks in advance.
Onur.

Hello there Pedro, please forgive me for my late reply, I was unable to test meanwhile,
and yeah, I removed the battery and booted my laptop with AC power. Result : the same sound.
I also noticed that, If i listen closely my charger unit, i can hear the same sound from the charger too...(It's obviously the same, but a hoarse noise)
Afterall, It's not distorting internal speakers, that happens when i use the line out for my amplificator.
Whenever I plug it out, I have no problem such as an annoying distortion voice on line out jacks.

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