Guys,
If you are consistently having issues with Guide/Mini Guide Data Unavailable:
(One of my sources said to try the following: )
Mine was doing that, and a tech told me to do this if it acts up...
1) turn box on
2) hold reset button (two arrows) for 7 seconds
3) release button after 7 seconds
4) wait for reboot
He said it clears out all the config and forces it to redownload the config file. It fixed mine and it doesn't do that anymore.
Satch