XPS 15 9550 - Backlit Keyboard cannot turn it on

Question

Windows 10 Home with windows update on.I replaced the keyboard (a few keys were working intermittently) and have not gotten the back-lit to work. It worked with the old keyboard.(1) Looked in the BIOS (believe 1.31.1) there is not a configuration for the backlit keyboard.(2) Installed Dell Feature Enhancement Pack, which should give the options from the control panel, but it does not give any options for back-lit feature only for the control buttons.(3) Pressing Fn F10 or F10 does not turn it on.(4) Looked in device manager. It only shows three 'generic' keyboards including PS/2. None with backlit.Am I missing a driver?Please advice.

PerNil · Answer

Update: BIOS 1.13.1 12/12/2019

XPS

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