Hi ewongsmx Thank you for your swift response and apologies for my late response. I have rectified the problem myself, the problem was being caused by the laptop hinge being lose, so when the laptop lid is closed it would dim the display and turn off the keyboard backlight, but for some reason it was the opposite way round and this was due to lose screws. Thank you for your assistance in this matter. Kind regards Lewis Brumby
Hi I decommissioned a Dell Latitude 5490, did a data wipe and I decided to reset the BIOS and chose the 'Restore Factory Defaults' option which successfully reset the BIOS however, after restarting the laptop the screen immediately went very dim, the backlight on the keyboard does not illuminate and the power button light does not come on at all. I have updated the BIOS, I checked to see if the brightness for the screen is correct in which it is, I then checked to see if the backlight for the keyboard was disabled in which it is also not and this has not worked either. My last resort was to update the BIOS to 1.26.0 which has not helped either. I am out of ideas now and would appreciate and support I can get. Kind regards   Lewis Brumby
Dell Latitude 5490 - Hardware Faults After Resetting BIOS