4-8 Maintenance and TroubleshootingTable 4-2 Problems and SolutionsProblem Symptom SolutionMonitormalfunctionUnable to synchronize display. 1. Adjust the monitor’s synchronizationcontrols.2. Check that the monitor’s resolutionmatches the video setting or the videodriver used.3. Check that the utility is not selecting arefresh rate/resolution that is notsupported by the monitor.4. Check that the driver used matchesthe capabilities of the video controllerand memory.Wavy display. 1. Check that the computer and monitorare not near motors or electric fields.Blank display. 1. Press any key or move the mouse toensure power management has notblanked the display.2. Check that the monitor power switchis on.3. Check that the monitor cable isattached to the video connector at theback of the system.4. Check cable connections between theAC power supply and monitor.5. Adjust brightness and contrastcontrols on the monitor.6. Check cable connections between themonitor connector and the systemboard.7. Replace system board.8. Replace monitor.
