Last reply by 10-18-2019 Unsolved
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2 Bronze
2 Bronze

M5540 CABA

Posting this here as it’s basically an xps15 and precision doesn’t have its own sub forum I could find?

£2.5k on a laptop and I can’t even control my own brightness? How are dell still selling laptops with out a CABC bios switch?

even more amusing were the “solutions” provided to me by support, in order:

1- wipe the laptop and reinstall windows

2- set up a service request to replace the motherboard

3- downgrade the bios to check of the switch was there


thankfully I have a small amount of tech savvy so didn’t waste days pointlessly having to rebuild my laptop. On escalation I finally got the answer that the model doesn’t have a BIOS switch and the call was closed.


rant over- anyone have any solutions? FHD model

Reply (1)
Dell Technologies

Hi Adamdavi3s,

Thank you for writing to us and getting this case to our notice.

We do see that your are in contact with our team via another of our Social media platform for the same issue. Please private message me if you have any other question you might have.

DELL-Akshatha M
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