I get pop up "OSD" locked..How do I unlock OSD?

OSD probably refers to on screen display. and since the error message specifically states Windows XP you can eliminate anything that is not running Windows XP as the OS so likely suspect is #1.

Hi rimandopaolo,

I see that you are getting the OSD locked pop up on your screen.

Press the Menu button on your LCD monitor look for the OSD option on the menu once pressed selct the OSD option try to see if it will give you an option to unlock the OSD setting on your LCD monitor

I hope this helps.

Have a nice day,

mvincentc

Press the OK button for 15 seconds. That should unlock it.

Easy hold down the menu button for 10 sec after the lock out pop up appears press the sound button

Estava também com o mesmo problema de voces, já estava irritado, então abri o monitor e desconectei a ligação com a placa de controle dos comandos dos botoes do menu. é fácil fazer. Só que não vai funcionar mais os botoes. pelo menos essas mesagens não vão mais incomodar.

Hold the MENU button for ten seconds to unlock or lock the OSD.

This is from the user manual for the monitor. You can download a copy from hp here:

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&product=324216&os=228&lang=en&

Click on the "monitor user's guide" link to download.

There are four adjustable options on the OSD settings screen: Lock OSD settings, Timeout, H Position, and V Position.
To change OSD settings:
1 Open the OSD setting screen under the Advanced menu. See
“Using the On Screen Display” on page 25.
2 Press the Browse buttons to select the option you want to adjust.
3 Press the Select button to check the option.
To change OSD lock setting:
1 Press the Browse button to select yes (lock) or no (unlock). The
setting is automatically saved when you change the value.
2 Choose Exit sub-menu and press the Select button to return to
the OSD Main Menu or press the Menu button to exit OSD.
NOTE: Once OSD is locked, all OSD functions including the
shortcut buttons are disabled. If OSD is locked, pressing
any button on the monitor directly opens the Lock OSD
settings window so that you can unlock OSD.

that depends on the brand and model of monitor ,
it normally takes 2 buttons pushed at same time to unlock it.
if you have side buttons its normally them.

All buttons can be locked or unlocked when the 'Menu' button is pushed and held for over 15 seconds.

Push the menu button for 5 seconds and the message "OSD UNLOCKED" should appear.
Shady, 14years old :)