I've had my IdeaPad Notebook P500 for over a year, and rarely had an issue with it. Today, I accidently touched the F11 key, which happens to be the "Brightness minus" key. Immediately, the screen went very dim, to the point where it actually hurts my eyes to be typing this.
I can adjust the brightness sliders up and down on the screen, using both the F11/F12 keys and the slider box available from the "Brightness" selection under "Settings". Even though the sliders go up and down, the screen stays the same very dark level.
I have uninstalled and re-installed the Intel HD driver.I have shut down the laptop and turned it back on while holding the F12 (Brightness plus) button. I have even rebooted several times.
Is there a way I can get this rectified ?
Currently, there is a step shared by a community user - changing registry.
NB : The steps above was preparedby oneofour customers and it has worked for them. Please be advised that Lenovo does not take any responsibility with the alteration of the registry key being done to your machine. By altering the registry key by following the steps above is strictly at your own RISK.