First checks
Identify the message
Check whether the warning comes from the TV or the receiver. If you cannot see the receiver menu, check the TV input and its HDMI connection first.
Record the exact error
If the receiver menu works, note the error code and model. Select the matching provider below; a reception fault and an activation problem follow different support paths.
Use the model-specific checks
Follow the official source for accessible indoor connection checks. If the next step requires roof access or dish realignment, contact a qualified installer.