Hello everyone, i bought my n45sf a month ago and i'm experiencing a problem that my lappie sound will be auto disabled at random times, well maybe its not random but i've no idea what cause it to disable. Of half the time i need to restart my comp to get the sound working again, others i'll close all the program running and things would be fine.

And i have this resonance noise from the metallic strip speaker cover that occurs in low pitches of sound. That's pretty annoying because all kind of musics have low pitches sound.

I'm wondering that is it me only? I'm a noob in these stuff can anyone give me some advices?