have a secret menu - press and hold the "Contrast" and "Brightness" buttons on the front of the monitor and whilst still holding turn on the monitor and as soon as the screen comes on let go give it 3 seconds and press "Menu".
Just a little tip for anyone wanting to know.
I found this out today when my monitor started going funny colors - most of the screen is green and all the whites are pink it's awful!! My black desktop background has a green tinge to it lol - however if I go into this menu and play with the colors and reset them all it's fine but once the monitor is turned off it goes back t being iffy colors again.
Think it's time for a new one - might end up with a CRT lol
Another one is on Dell monitors, holding Menu and the + button whilst turning the monitor on enters a service menu. Not sure what's different about it other than showing you the panel type etc though...