Where do I find System Preferences?
Another weird thing is that it starts up fine, and then after all the automatic startups are finished, it dims down. Something is telling it to dim. But I can’t figure out what.
Do you have a “dock” bar along the bottom of the screen?
It’s one of those icons.
Or, you might try right clicking on the background and going into the properties for the display.
Cheers
Also, if you have an Apple icon on the top left of your screen, you can click on that to access the system preferences.
Cheers