It was working fine before i went out tonight, came back, turned it on and my volume keys wont work, it makes the splodge sound but nothing happens! There is also a little white circle with a line through it (like a warning sign on a street) underneath the volume counter. One place said to plug in a headphone jack and take it out straight away, that seemed to fix the same problem with other people but not me!! Please help! *edit - also, at the top right hand corner the volume control will not work on there either.