Hello, I have IPad 2 and for some reason I can hear no sound when playing videos that I have on my IPad or YouTube or any other video. When I try to turn volume up with the switch on the side it says sound effects and does not turn volume up. I can hear the face time alerts and all the ringtones and so fourth but can not on the videos. Just wandering if anyone could help me or if I needed to send it for repair. Thanks.