Last reply by 07-16-2021 Unsolved
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2 Bronze
2 Bronze

Laptop Keyboard Backlight Fade Has Stopped Working

I disassembled the Dell 7577 laptop recently to repaste CPU and GPU. This process included removal of the BIOS battery, which reset the BIOS settings. After reassembly, I changed BIOS settings back. The backlight level is set to dim. The keyboard backlighting with AC setting is disabled.

Still the keyboard backlight stays on all the time. Switching backlight levels with Fn+F10 doesn't work anymore. When I enter BIOS, I can see the backlight level setting has been changed correctly.

Any chance I messed up the cables during the reasssembly?

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2 Bronze
2 Bronze

It's alright. I fixed it. It was just a loosen cable. For anyone wondering, it was the keyboard-backlight cable. You can look it up in the service manual.

5 Rhenium

Check your BIOS settings to see if you can configure backlight illumination there.  And if you haven't already, try Fn+F10 rather than just F10 in case you changed your Function lock so that the F keys act as F keys by default rather than performing the function shown on their icons.

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