Pulled the battery, no change.  Tried to reset the BIOS again to defaults, and held power button for 30 secs. Got it figured out.  It might have been an issue from manufacturing.  I checked under the battery and the ribbon cable for the backlight was in the socket but not locked down.  Reseated the cable and locked the connector.  I now have backlight controls in the BIOS for the keyboard.
Hello, we have a 7430 with the backlit keyboard.  Problem is, the keyboard is backlit all the time.  The F5 key does not change the brightness of the backlight, tried it with and without the FN key.  Interestingly, in the BIOS, under keyboard there are no options for keyboard lighting like in our other 7430s.  I've defaulted BIOS settings and installed BIOS 1.14.1 but there are still no lighting options in the BIOS.  Anything else to try before pulling the battery?
Latitude 7430 Keyboard Lights always on