What is the slution to my blackberry passport keyboard light shuting down in the dark?

My blackberry passport keyboard does not light up in the dark. A reboot and even security swipe did not solve the problem. Running the BBVE shows my sensors are working fine but when I check, the sensors detects my phone is in sunny environment when actually it is in dark.

Software release OS 10.3.1.908

OS 10.3.0.1418

Please help.

1. Try a full security wipe.
2. Try reloading the original device software via Link.
3. If the above steps fail, consider returning the device for warranty.