12Trouble Troubleshooting TipScreen is blank. Screen saver activated.Video Cable problem. Check for proper installationChange video cable .Faulty video display. Needs Service.Image is dim, even withbrightness and contrastcontrols set full UPVideo cable problem. Check for proper installation of cablesFaulty video source.Faulty display.Image not centered Reset the horizontal and vertical positioning using the on-screenmenu. Check to see if video source is operating within themonitor’s rangeImage will not adjust Video timing outside of range. Use the on-screen menu to adjust the Clock Setting.Make sure timing is within VESA standard.Image is not stable. Monitor has incorrect or bad sync signals.Check for proper video cable installation.Replace suspected faulty cable.Check to ensure that video source is operating within the display’srange.Vertical shaded bars onScreen imageHorizontal size not properly adjusted.Adjust horizontal size settingsColors are missing Faulty video cable.Missing from video source.Connect video source to another displayScreen jitter or noisy displayTroubleshooting Cont.Monitor clock phase not properly adjustedSlight distortion in text orGraphics.Not working in native resolution.Display is present but “bars”Appear or roll across screenGround loop problem between computer and displayInterference from adjacent equipmentThe background looksAcceptable but text andIcons seem to be missingrows of pixelsVideo running interlace mode.