I bought the galaxy tab 10.1 a week ago...had great time..watching movie,music, utube...etc... But today all the sudden sound did not come out. I thought maybe i put it on mute..but no... So i went into the setting-->sound-->volume--->evrything was normal...so i tried to adjust the volume..but no sound at all.. Only the alarm worked.... Notification,media,and system...did not work...and it was not even on mute setting.. I even went into tablet option...but it says sound is on.... I don't know what is going on.... Could anybody please help me?