Dell Projector 2200MP - Manual (Page 26)

Factory Reset
Select Yes to reset the projector to its factory default settings. Reset items include both
computer image and video image settings.
Computer Image Menu
Computer Image- Note: this menu is only available with computer input signal.
Frequency
Change the display data frequency to match the frequency of your computer graphic
card. If you experience a vertical flickering bar, use the frequency function to make an