The Fn+F4 and Fn+F5 keys (to adjust brightness) is not working in my laptop. It was working perfectly fine till yesterday.
But then, I reinstalled Windows7 due to some software issues, & I'm having this problem now.
Not only this function key issues, but also, I'm unable to adjust my display resolutions.
Somebody here, PLEASE HELP!!
My laptop - Dell Vostro 1550
OS - Windows 7 (64bit)
