LG HU70LAB.AUS Owner's Manual page 164

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There is a difference in picture quality for each channel.
•
XX-0 channels are analog channels. It is recommended for watching digital
channels such as XX-1.
• Run [Picture Test] first. If it is normal, there may be a problem with the
broadcast signal.
A digitally broadcast program stops or its screen is broken.
•
This happens when a signal is weak or reception is unstable. Adjust the antenna
direction or check the cable connection.
• If the signal strength is too low in
[Channel Tuning]
management office to have the signals checked.
•
If you are using a set-top box, consult its supplier.
I see vertical lines in all four directions on the screen, or colors are blurred
when I try to connect to HDMI.
• (Q. Settings)
Set [Just Scan] to [Off].
[Just Scan] shows you the original image as it is. You may see noise in all four
directions on the screen if the signal contains noise.
(Q. Settings)
[Manual Tuning], contact the broadcasting station or
[Picture] [Aspect Ratio Settings]
[Channels]
[Just Scan]