I can't change the brightness (not fn keys)

I recently got a new laptop and replaced the preinstalled Windows 8 with Windows 7. Unfortunately, the special options to the function keys (wifi on/off, brightness, change volume, change multiscreen mode, etc.) don't work. Does anybody know of a way to fix that?

hi, i have a lenovo ideapad y570 windows ultimate , its been 5 months of use and there is of course there is no prblem with it at all..but then i noticed when i press fn+up/down,normally it will adjust brightness of my laptop and it will display rectangular bars showing how bright my laptop...

I have an Acer Aspire 8935G with W7 HP 64 on an SSD and Vista HP 64 on an HDD. The Fn keys controlling the display brightness control work on the Vista boot but not on the W7 boot. All the other Fn keys function as they should on the W7 boot. The Aspire has an OEM ATI Radeon HD4670 graphics card....

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...

Did a clean install of windows 7 on my sony vaio fz21z laptop. Cannot find a solution to get the brightness keys working also found driver for bluetooth that works fine but cannot turn the device on or off. I have been told that it is a separate piece of software but cannot find this. Please can...