Hotkey to change brightness

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Hi I was wondering if there was a way to bind a key to increase/decrease brightness of my laptop screen.

I can use the regular FN+Fnkey combo but I am using an external USB keyboard so it would be easier to use a non FN key combo.
I tried reading the scan codes of the FN+F6 key but I couldn't get any, so I can't remap it with a tool like AutoHotkey.

Also, since I have the slider thing in Control Panel > Power Options, this seems doable with a software.

Last note. I do not want a 'screen dimmer' program that does not actually dim the LEDs behind the screen.

Thanks for your input!
 

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Toshiba A305D
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Windows 7 Professional 64
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ATI Raedon HD 3100
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Realtek
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Hi.

Windows Key + X opens the Mobility Centre.
 

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Computer Manufacturer/Model Number
Sony Vaio FZ21Z
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Windows 7 Ultimate x64 ®™
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Intel Core 2 Duo (2.2 GHz)
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Sony (Intel Chipset)
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2x 2GB Corsair (667 MHz)
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NVIDIA 8600M GS (256MB)
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Sigmatel
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15.4" TFT X-Black
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Logitech Anywhere MX
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Computer type
Laptop
Computer Manufacturer/Model Number
Apple
OS
El Capitan / Windows 10
CPU
i7-4980HQ
Memory
16GB
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Iris 5200
is this true always or just with laptops/netbooks?
I would imagine it's just for laptops. Are you holding the Windows key down whilst pressing the X key?
 

My Computer My Computer

Computer Manufacturer/Model Number
Sony Vaio FZ21Z
OS
Windows 7 Ultimate x64 ®™
CPU
Intel Core 2 Duo (2.2 GHz)
Motherboard
Sony (Intel Chipset)
Memory
2x 2GB Corsair (667 MHz)
Graphics Card(s)
NVIDIA 8600M GS (256MB)
Sound Card
Sigmatel
Monitor(s) Displays
15.4" TFT X-Black
Screen Resolution
1280x800
Hard Drives
Western Digital 300GB Scorpio Black (7200rpm)
Mouse
Logitech Anywhere MX
Internet Speed
Sky 5MB
Here is a 3rd party app for setting the percentage of brightness on your monitor. I don't usualy reccomend apps but this one seems to be liked by several other members. So if you want to give it a try, I would just suggest that you create a resore point first before using it incase you don't like it you can uninstal it then restore back to before you installed it. Fabe Elite Freeware: Quickly dim your screen with DimScreen
 

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Self Built
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Windows 7 ultimate 64 bit / XP Home sp3
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intel Core 2 Duo E8400 3.0ghz
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Asus P5ND bios 1401
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8 gigs 1066 OCZ Fata1ty
Graphics Card(s)
EVGA GTX 580 Call of Duty Black Ops Edition
Sound Card
Creative Soundblaster Audigy 2zs
Monitor(s) Displays
Asus 24in LCD's 2MS X2
Screen Resolution
1920x1080p @60Hz
Hard Drives
WD Caviar 500 Black/ WD Caviar 200 Blue
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OCZ 700W GameXtreme
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NZXT Apollo
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Logitech Bluetooth Wireless MX5000
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Logitech Bluetooth Wireless MX1000
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Download 19.83 Upload 0.97
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