I know that. There's a way to fix it.
This usually occurs when either your battery is NOT plugged in correctly or just not plugged in at all, or when the battery is plugged in, the screen resolution doesn't fix itself.
To fix this, close everything in the background, and unplug and replug your battery until the mouse disappears for a second and the screen goes black, then comes back alive again. (This happens when your laptop is fixing the resolution to a recommended state).
If the screen's resolution does not fix itself, then re-start your PC, or put your PC to sleep, wait about 1 minute, then wake it up. Then try it again.