I am a happy owner of a new L420, but I have the feeling that the fan is quite noisy. It is not so much the air flow noise, that is really fine, but the sound produced by the fan motor, which is conducted to the case and to the internal microphone, so it is quite audible in recordings or when talking on i.e. Skype.
I have recorded the noise over the internal microphone with normal volume settings and while the fan was running at lowest speed: ThinkPadL420FanNoise.mp3
Could someone here please compare and possibly send me a recording of your Lx20 so I can compare as well?
I'd like to confirm as good as possible before I send the notebook away for repair.