Check that the unit is plugged in. If it is, try plugging another device into the socket to make sure power is flowing to it. If the power is working, there may be something wrong with your remote control.
First, check to see if the volume is muted by pressing MUTE or + on your remote's VOL button. Try changing the channel to see if the problem is only with that one channel. If your system uses standard video or S-video connectors, be sure you have connected the audio-out jacks on the receiver to the audio-in jacks on your TV or audio receiver.
Check the connections of your video cables to make sure they're properly seated in their jacks. Also, try changing the channel to be sure the problem isn't just on that one channel. If you have no connection after five minutes, make sure all the connections to your receiver are secure. If you're still having problems, visit att.com/support.
The green LED surrounding the receiver's Power button should flash each time a remote button is pressed. If this happens but the receiver doesn't respond to your commands, you may need to perform a restart. To restart your receiver, press and hold the Power button for 10 seconds. If you're still experiencing problems, visit att.com/support.
Make sure there isn't anything in the path between the remote and the remote sensor on your receiver. Be sure you're aiming your remote at the receiver. You have to be within 20 feet of the receiver for the remote to work properly. If these steps don't solve the problem, try replacing the batteries in your remote (see next tip). Please visit att.com/support for more help.
There are two possible reasons: the program may not be available in your region, and/or local laws may prevent AT&T from airing the program on a specific channel. In some cases, this programming may be available on an alternate channel within your existing TV package or by subscribing to an additional package (e.g., ESPN GamePlan). AT&T provides access to some of these packages. Visit att.com/u-verse to get more information on available packages.