Try holding your power button or menu button(certain cases) for 45 seconds. You must get a message saying OSD unlocked
On a NEC MultiSync LCD1735NXM Monitor push the left select and the left function button at the same time. hold for 3 seconds and release. you should be out of the lockout mode. you do the same thing to lock it.
SOURCE: HP 2009m monitor. OSD lockout keeps appearing on
OSD (On Screen Display) lockout. To resolve the issue you can hold the power button of the monitor until you get another message something similar to "OSD unlocked"
try holding menu button also if it doesnt workout
SOURCE: How to unlock OSD lockout in HP L1940T Monitor
How to unlock HP 1940 LCD monitor?? i try with holding menu button and power also..but didnt show me unlock...i hold like 1min even more...and its keep to blink OSD lock...and Main Menu on my screen.Can u tell what i need to do Thank you
SOURCE: what does osd lockout mean and how can i fix it?
on the front of your monitor find the menu button....hold it in for 10 seconds. This should fix it.
Press the "Menu" button again if the lockout message remains on the screen.
Use the arrow buttons to navigate through the main menu options.
Highlight the "Settings" or "OSD Menu" option and then hit the Menu key again to access the new list of settings.
Scroll down to the "OSD Lock" heading. Use the arrow keys to change the setting to "No." Hit the Menu key again to return to the main menu. Scroll to the "Exit" setting and then hit the Menu key a final time to exit the menu setting and remove the OSD lockout.
hope this helps
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