My Dell monitor is being locked. I read the manual; it said
" When the OSD is locked, pressing the 'Menu' button will take the user directly to the 'OSD settings' menu, with 'OSD Lock'
preselected on entry. Select 'No'(-) to unlock and allow user access to all applicable settings".
But actually, when i press the "Menu" button, it shows nothing but a white lock and blue background on the middle of the screen. Even the "+" and "-" button, the results are the same as the "menu" button. How can I get rid of it? Please give me some advice.