Hello there George2004,
Here is an article about resetting your Apple TV.
Apple TV (2nd and 3rd generation): How to restart your Apple TV
If you still need additional troubleshooting assistance, allow me to recommend this article:
Apple TV: Basic troubleshooting
Just in case you need it, here is also an article about restoring the device.
Apple TV (2nd and 3rd generation): Restoring your Apple TV