LG 47LD650 Owner's Manual page 161

If you don't press any buttons for a while, the play information box
will float across the screen. This prevents screen pixel damage due
to a fixed image remaining on the screen for a extended period of
time.
!
NOTE
A damaged or corrupted music does not play but displays 00:00 in playtime.
Music files with copy-protection will not play.
Press ENTER or button to stop the screen saver.
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