LG 47LM9600 Owner's Manual page 193

If the following symptoms occur, please recheck the system. It may not be a
failure.
General
Problem
Cannot view certain
channels.
After turning on the TV,
there is a delay before
full images appear.
Adjust the location or orientation of the antenna.
Save the desired channels on
It is not a problem because this process was intended to
clean up the image noises that may occur when turning on
the TV.
Solution
Auto Tuning or Channel Edit.