I don't know what you're referring to, but here is something i think it might be...
1. Power on the monitor.
2. Press and hold the MENU button for at least 15 seconds.
3. Look to see if an UNLOCK icon appears on the screen.
4. Release the MENU button and wait 5 seconds.
5. Press any button on the monitor to test.
6. Turn off the monitor if it is no longer needed.
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