Thank you for your e-mail.
We would recommend that you speak to our Microsoft Technical Support Team regarding this issue.
By calling Microsoft 0870 60 10 100 (UK), selecting option 2 on the main menu and thereafter option 3, you will be automatically transferred to an agent.
What will then happen is they can diagnose the problem, and either help you resolve it or they will place an order on your behalf for a replacement.
At Microsoft we have a 2-5 hardware warranty, therefore this means you may even get a new one free of charge through the post.
Our fellow colleagues at Microsoft, we are sure, would be happy to assist.
For any further queries, please feel free to contact us anytime.