HP Flat Panel Monitor - Locking and Unlocking the On-Screen Display (OSD)
Issue:
How is the on-screen display (OSD) lock enabled or disabled?
Solution
The OSD lock can be enabled or disabled by pressing
and holding the Menu button on the front panel for 10
seconds. If the OSD is locked, the warning message OSD
Lock displays for ten seconds.
If the OSD is locked, press and hold the Menu button for
10 seconds to unlock the OSD.
If the OSD is unlocked, press and hold the Menu button
for 10 seconds to lock the OSD.