I would take it into your providers local store. I had a similar problem. Every time I connected my Galaxy Nexus into the computer it would “register” by making that beep sound but then it would say that the device was not recognized. I ended up being told my USB port was faulty and I bought an external battery charger for $2 on ebay as well as an extra battery fro $10. This was a much cheaper fix than sending my phone in since I had a crack in it there was no longer a warranty. Now I always have one battery charged and just simply switch them. Your problem could be a lot simpler however so I would first suggest just asking at your local service provider.