Hi, my sound has suddenly stopped working. It was fine last night, but when I came home today it wasn't working. I tried plugging in headphones into the audio jack and still no sound. Right now I'm using hdmi cables. Can someone please post some suggestions as to what I should do to further diagnose the problem? I'm using windows 7. [EDIT] Oh and everything says I have sound. What I mean is, when I am playing a video with sound and I watch the system sound control, the sound gauge lights up in accordance to the video.