This message means your TV is not able to receive a signal from the device its been told to look at …ie the digital receiver.
This message can usually be resolved with 1 of the following 3 steps:
Pressing that button will either bring up a menu showing the available inputs, or it will display one of the following inputs:
Video 1, 2, & 3 (RCA Cables)
Component 1, 2, & 3
HDMI 1, 2, & 3 (Most commonly used with HD)
Game (XBOX, PS3, WII)
Cable (Just using the Coaxial cable from the wall)
TV (using the antenna jack and connecting it to an antenna on your roof)
If you know which input your receiver is connected to then change your TV to that input …IE HDMI or Component 1, 2 or 3.
If you don’t know which input you are using, then scroll through them all SLOWLY until you get a picture. (allow 5-10 seconds between each change so the TV can unscramble the video from that input)
NOTE: Some televisions will default to a different video source such as TV rather than the source your receiver is plugged into. If you see this message after every power outage check with tv manual to see if you can set a default input.