MONITOR CONTRAST AND BRIGTNESS TESTS. - Secondary Screen adjustment: For brigtness use pad VR200 (located on control board P751). For contrast use pad VR201 (located on control board P751). ***** WARNING: SHOCK HAZARD! ***** - Auxiliary Monitor adjustment: For brigtness use pads G2 and R323. For contrast use pad R315. PRESS C - To Display Calibration Image.