Problem with my iPod nano 3rd generation?

2 days ago I used my iPod and everything was normal than I putted it on my desk(no one touched it after that).When I wanted to use it again it refused to open,it remained black no matter what I’ve done to him.When I connect it to my computer(PC),iTunes tells me that my iPod is corrupt and I have to restore it.When I click restore it appears a bar which shows me the progress.It stays in waiting for 5 hours and than it tells me that an error occured.What can I do.Should I buy a new one?