MISSING VOLUME SLIDER BAR SOLVED!!!

I have found the culprit! It has taken me a very long time to figure it out what it was but it has finally been found. The volume slider disappears when playing music or watching videos but otherwise works.

The problem is the 32pin connector. If you don't believe me take your phone and place a hard plastic card of some sort (creditcard, school I.D) and place it underneath the 32pin connector. Look at your volume slider and it should appear! You must get your 32pin connector replaced.