[G4] Weird 15" LCD display problem

[Tracker at aol.com]

Somehow, he has reset the monitor preferences to the new settings. This 
function, the inverted image colors/black & white negative-like appearance, is one 
of the settings available to users who have visual defects or handicaps or 
just want a different visual effect on screen.

He caused the change by doing something to the OS preference settings while 
he was the logged in user. It wasn't simply tapping one of the F-keys that did 
it. Maybe he needs a little more training in OS-X and its capabilities/hazards?

When he is the "logged in" user, OS-X sets the preferences to his 
personalized settings. When he logs out or another user logs in, the settings revert to 
the normal set of preferences or the newly logged in user's preferences and the 
condition disappears.

You will have to have him log in as the active user and then go to the 
monitor controls to reset his preferences back to normal and save the change as his 
current preference.