There will be a backlight option in system setup -- the hardware is only part of the support. If that option is not present in setup, the system does not support a backlit keyboard (it is common for the same basic system board to be used in multiple models, so the presence of a backlight connector is not always sure confirmation of backlit keyboard support).
Thanks, I will update the latest BIOS and see whether the option is available in BIOS.So if it is not there, you are telling that system does not support a backlit keyboard. Are you sure?
ejn63
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June 24th, 2021 06:00
No, but your dual threaded asking of the same question makes it confusing to follow.
What I wrote is that it is unlikely that any BIOS update will add support for a backlit keyboard that wasn't present when the system was new.
chamod max
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June 23rd, 2021 03:00
On my Laptop the keyboard backlit slot named KBLIT is available. So it should work. Is it.
ejn63
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June 23rd, 2021 03:00
Go into setup - there will be an enable setting for the backlight (F2 at powerup) if the system supports a backlit keyboard.
ejn63
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June 23rd, 2021 04:00
There will be a backlight option in system setup -- the hardware is only part of the support. If that option is not present in setup, the system does not support a backlit keyboard (it is common for the same basic system board to be used in multiple models, so the presence of a backlight connector is not always sure confirmation of backlit keyboard support).
chamod max
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June 23rd, 2021 09:00
Actually there no such thing in BIOS, Is there any way to get that option to BIOS(Like updating the BIOS).
ejn63
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June 23rd, 2021 09:00
Unlikely, but possible. A16 is the latest BIOS:
https://www.dell.com/support/home/en-us/product-support/product/inspiron-15-3542-laptop/drivers
If that's in place and you don't see the option to turn the backlight on/off, your system does not support a backlit keyboard.
chamod max
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June 24th, 2021 02:00
Thanks, I will update the latest BIOS and see whether the option is available in BIOS.So if it is not there, you are telling that system does not support a backlit keyboard. Are you sure?
chamod max
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June 24th, 2021 02:00
Does A16 BIOS Slow down the dell 15 3542
ejn63
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June 24th, 2021 03:00
Unlikely; the system is a budget one to begin with, so speedy performance is not part of the design.
If there's no backlight option in setup, then the system has no backlight support.
chamod max
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June 24th, 2021 05:00
you are saying that it will slow down the PC.
chamod max
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June 24th, 2021 06:00
You are saying that it is possible to add a backlit keyboard option into BIOS after the latest update.
ejn63
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June 24th, 2021 06:00
It is possible, particularly if the BIOS has microcode to update against some of the Intel CPU exploits of recent years.
chamod max
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June 24th, 2021 22:00
Okay,I got it, thanks for the suppot you gave me.