2
I accidentally pressed the wrong key (not sure which) while typing and my laptop's screen went dim. I can't get it to go back to how it was. (I'm using Windows 7 64 bit.) What should I do?
2
I accidentally pressed the wrong key (not sure which) while typing and my laptop's screen went dim. I can't get it to go back to how it was. (I'm using Windows 7 64 bit.) What should I do?
1
The pressed key was F11 (without the Fn key pressed). The IdeaPad uses this key for "decrease brightness". F12 should do the opposite, but doesn't always work. To get it working, you need to edit the registry:
regedit
1HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
2"FeatureTestControl
to 0000f048
(hexadecimal)HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001
instead of HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
Source: IdeaPad P500 screen went dim
1
This worked for me on Windows 10
Open Device Manager (Search for it or right-click Start). Confirm the UAC prompt, if necessary.
Select Display Adapters and right-click on Intel HD Graphics 4000, then select Update Driver > Browse my computer for driver software > Let me pick from a list of device drivers on my computer. Choose "Display Adapters" as Device Type and select Microsoft Basic Display Adapter.
It's not apparent how that solves the problem. – Agi Hammerthief – 2016-05-12T18:34:33.433