Please forgive me in advance for some of my spelling / grammar mistakes as English is not really my first language. Even so, I will try to make this post as clear as possible.
So here is my problem. I have an Acer Aspire 4540 laptop that I recently repaired after laying in my closet with a broken display for some time. So I took it to a repair center and got my new 14' LED display installed. Everything on my laptop is working fine, even my screen is working fine. The only issue I've noticed is that when I try to increase or decrease my screen brightness it cycles between the max and min settings rather than dimming or brightening respectively.
Now, I know I've had this issue before but I can't remember if it was already like this before the screen broke. I have tried rolling back, uninstalling and reinstalling my drivers
several times yet the issue is still there.
Im running on Windows 7 Ultimate x86 and my graphics card is an ATI Radeon HD4200.
I know this is a small issue but I need to fix it since I spend a lot of time in front of my laptop.
Thanks in advance for your help.