Fn + F2 (Num Pfeil runter), lässt die Fn Taste aktivieren und deaktivieren
Dell E6430, BIOS A24 releated question:I need the Fn Key for changing the display brightness. Problem:Fn Key not working after Load BIOS defaults Question:How to enable Fn Key ?
Dell E6430, BIOS A24, Fn Key not wrking after Load BIOS defaults, how to enable 
Fn Key ?