I had the same problem with my Ipad. Plug it in to itunes and it wouldnt see it. Just see the ipad. Then it would make a noise and disconnect. As far as everything else it would be listed as N/A (In itunes) Tried everything. Changing cords, Computers, Updating, another cord, even told my ipad I would take it out for ice cream. Anyways, The charging port was bad. (Daughter Board) Replaced myself at $49.99 at badda bing. Back in action.
That's just apples way of getting you to buy the new products. You can trade your old gear in at the apple store for a low discount. lol