Dell UltraSharp FP Moniter Settings Are Locked

I have a Dell UltraSharp 19-in Flap Panel monitor. The settings on the monitor are some how locked. I want to be able to adjust the settings on the monitor using the controls on the front. If you press one of the settings buttons on the front of the monitor a picture of a purple 2-inch square with a white lock comes up in the middle of the screen. I can't get passed that.

I know I can you the OS to adjust the display, but I want the buttons to work.
I see a picture of a lock symbol on the back of the monitor with a small rectangle hole next to the symbol. Is this to put a lock on the screen so someone doesn't steal it, or is it or is there like some reset button or some way to lock/unlock the controls?

Note: I didn't get this monitor from dell. It does not have an express service code tag number on it or anything like that.

Who is Participating?
Gary CutriConnect With a Mentor Data & Communications SpecialistCommented:
You can lock or unlock the menu panel by pushing and holding the Menu button for 15 seconds
You can call dell support for help
The number is 1-800-624-9896 free support for dell customers
MikeBAMAuthor Commented:
WOOO HOOO!!!! THANK YOU garycutri !!!
That did it!

ded9 - I already called Dell, they wouldn't/couldn't help me.
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