This is a cut and dry issue of and internal fault, there are 2 ways you can go about this.
1. Get an electronics expert to pull it apart and have a look for you.
2. replace under warranty, if still valid.
Most internal faults are more expensvie to repair than to replace. Take your car back to the place you bought i from and let them know the problem.
**Working PART-TIME for Carjunky for a while, Please bare with me =)**
Going for GOLD in Beijing