I have a Gateway Laptop model number ML3109, and the little volume thing in the bottom right corner of the screen has a red x on it. I assumed I had the volume turned down, but when I try to turn it up it doesnt' work, and it says: No Audio Output Device is installed. I have had my computer for quite awhile now, and have listened to plenty of songs and movies so I know at one time it worked..can you help?!?!
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