What do you mean by Hard Reset? You held down the Home and Power?
Do you mean like the slider isn't showing up when you're playing music, etc?That happens when the bottom gets wet. Dry it off. Not sure it this really works, but try putting it in a bowl of rice.
Technology is some weird stuff, huh?
Check the top left side of it. You might have accidentally slide the Silencer on. That's what I did wrong when I got an iPhone.