For some reason, every time I leave my Laptop for a while the sound stops working. I keep my laptop on constantly an plugged into the wall like you would a PC (this isn't bad for it is it?) and within the space of a few hours of not using it, the sound disappears. The volume is on full and yet nothing comes out. The only way to get it to work again is to restart the computer. Does n e 1 know what the problem is? Because it's getting really annoying now.