Dell U2711 Flat Panel Monitor I have a Dell U2711 Flat Panel Monitor, which I have been using with my Mac, preIntel and Intel. Suddenly I cannot acces to any control, instead a padlock appears on my screen. Any help?
Press and hold the two bottom buttons (4+5) for 15 seconds. The lock symbol will "unlock" after 15 seconds and you should be able to use the OSD menu again.