I have my ProBook 4230s for about 2 years and i havent had many issues, however last night i was using my laptop and i decided to put my brightness to the lowest setting. I woke up this morning to find out my brightness levels wont change when i try to use the keyboard shortcut or when i change the settings in the control panel. My sound keyboard shortcut works but not birightness. Any help would be apprciated
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