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Check the following before calling for service.
Do you see "CONTROLS LOCKED" when
you push MENU button?
Do you see a "CONTROLS LOCKED" message on the screen.
This function allows you to secure the current control settings, so that
they cannot be inadvertently changed. You can unlock the OSD controls
at any time by pushing the MENU button and
the message "CONTROLS UNLOCKED" will appear.
button for 3 seconds:
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