Lcd dislays lock padlock and none of the buttons

Zaheer khan,
To unlock the monitor controls and get rid of the lock you can press and hold the menu button in for 20 seconds. You can also try the information listed in the link below.
http://www.paulstravelpictures.com/Dell-LCD-Monitor-Flashing-Padlock-Icon/index.htm
Thank You,
Dell-Jesse L
Dell Social Media and Communities

Anonymous,
To unlock the monitor controls and get rid of the Lock, press and hold the monitor Menu button for 20 seconds. You can also try this.http://www.paulstravelpictures.com/Dell-LCD-Monitor-Flashing-Padlock-Icon/index.htm
Thank You,
Dell-Jesse L.
Dell Social Media and Communities

Many monitors have an on-screen display lock (the padlock icon) that seems to get stuck.
Various suggestions in the links below - the one that seems to work most often is to hold the monitor's menu button down for 15-20 seconds to get the screen menu, then either try unlocking the OSD (On Screen Display) or do a factory reset on the monitor.
http://www.fixya.com/support/t448684-flashing_padlock_icon_in_middle_screen
http://www.paulstravelpictures.com/Dell-LCD-Monitor-Flashing-Padlock-Icon/index.htm
Different monitors have slightly different menus, but if it's a Dell monitor you can find the manual below (under Display):
http://support.dell.com/support/systemsinfo/documentation.aspx?c=us&cs=19&l=en&s=dhs&~cat=3

Hi,

You can follow these steps:

1.Click on the menu button in front of the monitor

2. Select OSD settings

3. Select OSD lock

4. Then choose Yes or No to lock and unlock it

Hope this helps

Thanks

Dennis

See my tip here: http://www.fixya.com/support/r9424404-fix_osd_lockout_or_screen_display

Try pressing and holding the menu button on your monitor for 15 seconds or until the padlock graphic changes to an unlock graphic. Hope this helps you.

The padlock is an indication that the On Screen Display is locked. You can also lock or unlock the OSD by pushing the Menu button for over 15 seconds.
http://support.dell.com/support/edocs/monitors/e171fp/en/controls.htm

http://www.paulstravelpictures.com/Dell-LCD-Monitor-Flashing-Padlock-Icon/index.htm

Give that a shot.

When the icon is in the unlock position, hold down the Menu key (the far left button in the lower righht hand corner) on your monitor. This should bring up the menu. From there, you can reset the factory settings.

Hold the menu button until the padlock unlocks, it takes anywhere from 30 seconds or even a minute or so