Thanks for the replay, but it was working without noticing.
I put everything in 100%, but everytime it boot up there was always a beep, i thought it was the hard drive, but after a few days I notice that the built-in mike was doing feedback.
For those that are having beeps in their laptops, check if you have a built-in mike and turn it off with alsamixer, just go to any terminal like bash (konsole, Terminal) or whatever you have and type
Thank you.