Hi, please help I have a 5 year old IBM Aptiva, my computer was fine an hour ago but I decided to get better color so I went to control panel, display, settings and changed the color from High color 16 bit to True color 24 bit. Then I had to restart after my computer restarted I only had half a screen and it was flickering real fast. Please sombody tell me how to fix this, I beg of you, thank you.