If L90D you need a PIN number to unlock it.
Connect to your original computer and run Plug-ins - Theft deterrence to enter or reset PIN - or go to web site via software - see below
Under the ‘Plug-ins’ menu is the ‘Theft
Deterrence’ option – a more accurate term than the ‘Anti-Theft’ sticker on the monitor
itself. Why? Well anyone can physically steal this monitor
from me. There is no Bond-like lethal gadget that would bring certain death to a would be thief. Rather, the theft
deterrent is a PIN
-based procedure that hinders the operation of the display once it has been removed from the host computer. Briefly, you register and store a PIN
to a secure web site, then set a countdown timer. If the power and display cables have been removed and the monitor has been attached to a different computer, the timer counts down. If the correct PIN
is not entered using ImageTune, the monitor
will enter theft
mode and display a large warning message. It doesn’t prevent the monitor from being swiped, but at least there's some satisfaction in knowing the thief can’t use it.
software called ImageTune that replaces the usual on-screen display (OSD) tools, arrives on an included CD. With it, you can adjust basic monitor
settings such as brightness and contrast with a mouse instead of with the small, squishy membrane buttons under the bezel.