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Push the "Menu" button on the front or side of your Dell
monitor. The button's icon resembles a miniature monitor. This will open
the main monitor setting menu. Push the button again to exit the main
menu and open the OSD menu.
Push the "Down Arrow" button on the monitor to scroll
through the OSD menu. Stop at "Factory Reset." Push the "Menu" button to
open the factory reset menu.
Push the "Down Arrow" button to select "Position Settings
Only" to reset the monitor's horizontal and vertical screen settings.
Press the "Menu" button to activate the setting changes.
Push the "Down Arrow" button to select "Color Settings Only"
to reset the monitor's red, blue and green color settings. Press the
"Menu" button to activate the setting changes.
Push the "Down Arrow" button to select "All Settings" to
restore the monitor to its original factory settings. Press the "Menu"
button to activate the setting changes.
Push the "Up Arrow" button to select "Exit" to leave the
monitor reset menu. Press the "Menu" button to exit the OSD menu. Push
the "Menu" button again to exit the main settings menu.
OSD Lockout or On Screen Display Lockout message is that irritating on-screen message that sometimes pops up when you switch on your monitor. This completely locks all monitor settings.
This problem has most likely happened to everybody at some stage or another. Everything has worked fine until now you turn on your monitor and have a message glaring you in the face displaying something about "OSD Lockout". This doesn't allow you to change any of your monitors settings, including the setting intended to turn off this message. While this problem mainly happens on HP monitors from my looking around I know that others have encountered it on other brands as well. The fixes I provide below should work on those monitors too so don't fear if your monitor isn't an HP model.
The HP Fixes
FIX 1 Plug in the monitor and power it up. Hold down the monitor's Power button until you get a message saying "OSD Unlocked". If the problem persists after OSD is unlocked then unplug the monitor from the wall, wait a few seconds (just to be sure I'd give it anything around 20-30 seconds) and then try again.
FIX 2 Instead of holding down the Power button, turn on the monitor and hold down the Menu button for 10-20 seconds. This should unlock the OSD.
FIX 3 Turn off the monitor, press down the Menu button and then turn on the monitor. Wait 10-20 seconds. This should unlock the OSD.
FIX 4 The Menu button may be stuck in a pressed in position. To get it "unstuck" you'll usually need to open up the monitor. If your not a seasoned veteran at opening up electronics (and knowing where all the screws go back into) then this could be tricky unless you know what you're doing. Unfortunately there are too many models of monitors for me to give a step by step instruction guide for you. If you have warranty this is where you should use it, I suggest you contact the manufacturer.
The AOC Fixes
FIX 1 Turn off the monitor, hold menu and power button together for 10 seconds then turn back on.
Currently these are the most commeon fixes.
1.Right click on desktop 2.Properties 3.Settings 4.Advanced
1.Open Display Color Calibration by clicking the Start button , and then clicking Control Panel. In the search box, type calibrate display, and then click Calibrate display color. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
2.In Display Color Calibration, click Next to continue
Press the OSD (On Screen Display) button, to display the OSD menu. Use the LEFT/RIGHT and UP/DOWN buttons to cycle through the various settings. Press the OSD button to "select" one of the settings to be changed. Use the LEFT/RIGHT and UP/DOWN buttons to alter the setting. Press the OSD button to "accept" the new setting.