Somehow I have fouled up my volume setting on my Chromebook laptop. I have looked it up and it says to, "Click on the status bar in the lower right corner of the screen. If the volume icon is grayed out it indicates sound is muted. Click on the volume icon again to un-mute the sound." Volume icon is NOT grayed out. I know that I must find "LINE OUT" and not internal speaker, BUT i can't find it. Please please help me.