I have a dell, and its a spot on laptop. The noise issue happens with most laptops nowerdays, its actually an earth loop through the power supply. You can stop the noise by -Originally Posted by TheRev
a) Unplugging your laptop
b) Take a 3 way extension lead, and remove the earth lead from the plug. (do this at your own risk)
Please be aware that removing the earth lead on the plug will only mean that your laptop isnt protected against your case becoming live, so you could theretically eletricute yourself, but if a fault occurs that may damage your laptop, the breakers in your house will trip and protect it. There shouldn't be enough power going through your laptop to eletricute you anyway. Ive had mine like this for years, and never had a problem. Just dont go pluging any amps or anything into that 3 way or you could get a shock...