B50-70 Screen brightness locked and cannot adjust

[diplomat7]

I have had my b50-70 windows 8.1  laptop for 2 months. A few days ag the screen brightness locked and I am now unable to adjust when I press f11/f12. I have tried adjusting screen brightness through the control panel but it made no difference. Please advise.

[neokenchi · Accepted solution]

hi diplomat7,

Welcome to the Forums.

Your problem might be similar to this article

Can you try the following:

1. Install the Default Brightness Level Patch, reboot the machine and observe if you can now adjust the brightness via the F11/F12 keys

2. If same problem, open the Device Manager > Display Adapters and uninstall the graphics driver (Intel or AMD) and ensure you put a check on Delete the driver software for this device. When finished, navigate to Control Panel (Ivon Views) > Programs and Features and uninstall the Display Driver then reboot. 

After the machine has restarted, reinstall the graphics from the B50-70 drivers page or from one of the links below:

Intel VGA Driver for Windows 8.1 (64-bit)

AMD VGA Driver for Windows 8.1 (64-bit)

Let me know how it goes.

Regards

[diplomat7]

I installed the default brightness level patch and then restarted the laptop and it has sorted the problem. Thanks for your help.

[pauline1028]

I did not see intel or amd under Display Adapters. Only Microsoft Display Adapter was there. Don't know what to do next.

[pauline1028]

There's also no Display Drivers on Program and Features..