How to turn off keyboard light?

To turn the keyboard backlight on or off, press the F5 key. If the backlight icon is not on the F5 key, look for the backlit keyboard key on the row of function keys. It might be necessary to press the fn (function) key at the same time to activate the backlight key. read more

Dell gives an option to turn off the keyboard backlight in the Windows Mobility Center. All you need to do is right click on the battery icon in your system tray and click on Windows Mobility Center. The Mobility Center Window pops up and you can either adjust the brightness of the keyboard backlight or even turn it off completely. read more

Since you are able to do it prior to upgrading to Win 8, it seems that an utility that comes with the Computer/keyboard was handling the keyboard light. Hence, you need to contact the manufacturer to obtain that utility and for further assistance. read more

Information The backlight that illuminates the keys on the computer's keyboard is off by default. To turn it on, press and hold the Fn key, and then tap the Z key. read more