Enabling the Function (Fn) lock1. Press the Fn+Esc keys.NOTE: Other secondary function keys on the top row are not affected and requires the use ofthe Fn key.2. Press the Fn+Esc keys again to deactivate the function lock feature.The function keys return to the default actions.Stealth modeLatitude rugged products come equipped with a stealth mode feature. Stealth mode allows you to turnoff the display, all the LED lights, internal speakers, the fan and all wireless radios with a single keycombination.NOTE: This mode is aimed at using the computer in covert operations. When the stealth mode isenabled, the computer remains functional but does not emit any light or sound.Turning stealth mode on/off1. Press the Fn+F7 key combination (Fn key not needed if Fn lock is enabled) to turn on stealth mode.NOTE: Stealth mode is a secondary function of the F7 key. The key can be used to performother functions on the computer when not used with the Fn key to enable stealth mode.2. All the lights and sounds are turned off.3. Press the Fn+F7 key combination again to turn off the stealth mode.Disabling stealth mode in the system setup (BIOS)1. Power off the computer.2. Power on the computer and at the Dell logo, tap the F2 key repeatedly to bring up the System Setupmenu.3. Expand and open the System Configuration menu.4. Select Stealth Mode Control.NOTE: Stealth mode is enabled by default.5. To disable stealth mode uncheck the Enable Stealth Mode option.6. Click Apply changes and click Exit.55
