Maintenance and Troubleshooting 4-7Problems and SolutionsProblem Symptom SolutionModem boardmalfunctionNo output from board. Check interrupts (see “SystemResources”).Check DMA channels (see “TechnicalInformation”).Keyboard or mousemalfunctionMonitor has prompt, but cannotinput data.Check that keyboard/mouse is plugged in.Check password (see “Setup Utility”).Disable password (see “SystemResources”).Replace keyboard (or mouse).Replace system board.Monitor malfunction Unable to synchronize display. Adjust the monitor’s synchronizationcontrols.Check that the monitor’s resolutionmatches the video setting or the videodriver used.Check that the utility is not selecting arefresh rate/resolution that is not supportedby the monitor.Check that the driver used matches thecapabilities of the video controller andmemory.Wavy display. Check that the computer and monitor arenot near motors or electric fields.Blank display. Press any key and move the mouse toensure power management has notblanked the display.Check that the monitor power switch is on.Check that the monitor cable is attached tothe video connector at the back of thesystem.Check cable connections between the ACpower supply and monitor.Adjust brightness and contrast controls onthe monitor.Check connections between the monitorconnector and the system board.Replace system board.Replace monitor.CD-ROM/DVD drivemalfunctionSystem power not on. Turn system power on.
