System Manual
Page 80
... "System Setup." This may have changed on -screen instructions. If the issue continues, reset your DIRECTV® Receiver. Select the "Reset" item from your TV and the receiver may not be connected...DIRECTV® Receiver, but there is no sound. Press the RESET button behind the access panel door on the screen. Frequently Asked Questions My video and audio are out of sync The audio track does not match the lip movements... on the front of sync, or may be set up incorrectly. Problem with an external stereo or surround sound system. 80 DIRECTV® NON-DVR...
... "System Setup." This may have changed on -screen instructions. If the issue continues, reset your DIRECTV® Receiver. Select the "Reset" item from your TV and the receiver may not be connected...DIRECTV® Receiver, but there is no sound. Press the RESET button behind the access panel door on the screen. Frequently Asked Questions My video and audio are out of sync The audio track does not match the lip movements... on the front of sync, or may be set up incorrectly. Problem with an external stereo or surround sound system. 80 DIRECTV® NON-DVR...