Sony PCV-RZ50CG User Manual page 66

The message, No data available is displayed in the Television Program Guide when:

The Guide has not been set up.

You have not agreed to the Television Program Guide's Terms of Service.

The Media Center cannot connect to the Internet and download new Guide information.
 Guide information is not available for your location, from the Microsoft TV listings service provider.
 Media Center has determined that the existing Guide information on your computer is expired or corrupted.
Page 66