Question about ASUS 90-A4C1K1000 Keyboard

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Trying to turn on keyboard backlight for my asus

I'm trying to turn on my keyboard backlight for my asus ux50v after fresh install of windows 7 in fact, most of my F keys don't work now. i'm not blaming it all on the install though. the install occurred after a botched attempt of getting my comp to run on Ubuntu and no luck. It was at that time that I noticed my backlight and other F keys not working.any ideas?

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You need to download the 'kb filter utility' from

Posted on Jan 29, 2011

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u should download DRIVER for WIN7 32/64 bit from and its all done

Posted on Aug 14, 2010

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Posted on Jan 02, 2017

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SOURCE: The keyboard has suddenly got limited function

I have the same problem with an Asus Eeepc 900HA. I am trying to solve, if you solve firts write to me to, thanks

Posted on Jul 14, 2009

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SOURCE: keyboard problem

I've been looking for the solution for an hour till i found it. it's so simple it makes me feel like an idiot. You just need to press numlock (Fn+F11) to solve the problem :)
good luck

Posted on Jul 30, 2009

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SOURCE: Asus Eee Pc 1005ha Keyboard stopped working when

Dear Friend,

Try entering bios setup by pressing F2
If it is not responding visit nearest service centre.

Posted on Jul 01, 2010

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1 Answer

Last week I had a new motherboard installed on my Asus Q500A laptop. When I got it back the keyboard backlights no longer worked. This wasn't a problem before I sent it out for repair.

This issue is caused by the BIOS being changed. Here is a post about it in the ASUS forum:
This fixes the issue in this one case : '7C' replaced by 'FF' in the EEPROM


make a usb boot drive, set your bios so flash drive comes first at start up, put bt.exe and fixmykb.bat to the usb key, run fixmykb.bat

Asus computers with a backlit keyboard come with the flag '7C' written in the cnfg page of the EEPROM.
It's a small sticky memory on the motherboard. Apart from the BIOS.

The flag address is cnfg DD (and not 27 as written in many forums)

It seems, again reading forums from all over the world, that not all Asus RMA centers know that !
Some replaced, the keyboard, the mother board (!), send the computer back without fixing it, but in most cases, fixed it without any explanation.

For months now, ASUS does not release a patch. A very simple app from windows could write this back to EEPROM. But here's the Asus problem : one flag in this eeprom (27) tells windows installer what version (like pro or ultimate edition) of windows to install... So may be some guys over there just dont want the BT.exe utility to be spread around.

In most cases, if you flashed the latest BIOS available, the latest ATK drivers and have your back lite keyboard not working, this fix will give the light back to you !

At last, some few users had the keyboard power ribbon unplugged. Before doing the hardware work to pull it out and risk damaging this fragile plastic stuff, try this fix.

WORKS ON G73 and U80V (just beginning the list). Brings also the light back to U80V illuminated trackpad.

Jun 16, 2015 | ASUS Q500a 15.6" Intel Core I5-3230m 750gb...

1 Answer

Stuck during boot

Cheak your h.d.d or keyboard.try to open computer without hdd or k/b.

Jan 17, 2013 | ASUS K52F-BBR5 Notebook

1 Answer

Good day PRO, I WAS TRYING TO INSTALL WINDOW 7 ON MY Asus Eee PC 1005HAG/1005HGO COS MY UNCLE CONVERTED IT 2 VISTA HOME PREMUIM and remain a day 2 Expire. When install window 7 i selected window 7...


Jul 21, 2011 | Computers & Internet

2 Answers

I use Asus laptop. after I install a new Windows XP sp3, the Fn key is not working, so i can not change the bright, the volume... How can I fix them?

Hi there,
The Fn function to change the bright etc is driven by the software called Hotkey software, please download the software from the Asus website and make sure you know the type of your laptop.


Apr 13, 2011 | ASUS 90-A4C1K1000 Keyboard

1 Answer

I have Asus G73SW and after replacing primary disk with SSD, instaling Windows 7 Ultimate x64 and all the drivers from Asus Drivers CD the keyboard backlight (and also the lighting underneath the display)...

I recommend reinstalling Windows using the original recovery media from Asus. That should have all of the original drivers and software needed. You can alway upgrade to Windows 7 ultimate after that.

Mar 23, 2011 | ASUS G73JW-A1 Notebook

1 Answer

My keyboard don't work properly since i install windows 7 ultimate what i suppose do to fix?

go too the ASUS link below and get your keyboard driver for Windows 7, select the keyboard you have

i hope this helps you

Nov 01, 2010 | ASUS 90-A4C1K1000 Keyboard

1 Answer

How do I turn on the back light to the keyboard of my ASUS UX50V? The light comes on mometarily during start up. The F3/F4 keys have a picture of a lighted keyboard, but do not activate the light.

Hi.. Norman
i hv bought the same laptop ..earlier i was facing this problem at day time , it consumes battery.but at night it does excellent work.
Now talk abt ur problem...
1. to on/off it use "Fn" key given near window key(near left control)
2.use Fn+F4 key to dim or off light
as u can use Fn+F5 key
3. to perminant off
and disable ATK HOTKEY driver..
NOw i have problem with my laptop(asus UX50V)..
it came with VISTA but i installed WIN7 ultimate.
now i can't open my webcam.. I dont have DRIVER for it..
if u kno help me where should i download driver for it...
rply soon...

Aug 04, 2010 | ASUS UX50VRMSX05 Notebook

1 Answer

Does the Asus U50F have a keyboard backlight? & how to turn on?


No i'm sorry but that model has no keyboard backlight. If you wanted one which did have a backlight you would have to purchase a customised one.


Apr 12, 2010 | ASUS Computers & Internet

2 Answers

Windows 7 on an ASUS R1F

I installed Windows 7 (fresh installation) and my R1F tablet works great!

Feb 13, 2009 | ASUS R1F Tablet PC

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