09-25-2017 07:57 AM
Did it ever work. Does the Spacebar have the backlight symbol on it? According to the base spec the backlit keyboard was optional - although I have no idea if any actually shipped without it.
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09-25-2017 09:53 AM
If you just boot into the BIOS so there is nothing running, does the backlight work? If not, my guess is that you most likely need a new keyboard. (Other less-likely things can also cause those symptoms, but keyboard is most likely.)