Track down some of the common hardware problems using the Microsoft Zune 80GB Troubleshooting page.
Identification and Background
A step up from the earlier 30 GB model, the Microsoft Zune 80GB offers some cool, new features including improved wireless music synching, a bigger screen, and a touch-sensitive directional pad. Microsoft also made the 80GB slightly thinner and lighter than the previous Zune. The Zune 80GB is competitive with Apple's iPod Classic.