I changed my screen resolution from 800x600
to 1280x1074
and now Windows starts up but there is no display and a message comes on a black screen saying Input not supported
. I can only start Windows in safe mode.
I checked in safe mode but there was no restore point available. I am using Windows 7. How can I get my screen resolution back?
EDIT:
i tried setting the resolution to 800×600 in safe mode and rebooting but still the screen remains black.
Also i enabled the 600x480
mode but still the same.
Best Answer
Try changing the registry keys that holds the resolution information for the display:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Hardware Profiles\UnitedVideo\CONTROL\VIDEO
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Hardware Profiles\UnitedVideo\CONTROL\VIDEO
Each of these branches contains several keys relating to the resolution:
DefaultSettings.XResolution
DefaultSettings.YResolution
Reboot into safe mode. Export the whole branch to make a backup incase something goes wrong. Find all the keys with the resolution that is not working, and set them to the resolution that worked. Reboot.