midi volume set to minimum but no midi

I was browsing profiles last night when all the sudden a message popped up saying midi volume set to minimum and the sound was gone and the screen switched automatically to tuner mode even though I didn't change the chicken head. I moved the chicken head to tuner and back and the browser screen came back but no sound. I then switched to tuner mode and there was an option to set midi volume to max. I pursed this and the sound was back. After pressing this option was no longer available.