IBM Aptiva 2144 Hardware Maintenance Service

MonitorRun the Setup Utility and make sure the monitor type shown matches themonitor installed. (See Appendix, “Model/Monitor Configurations and FRUPart Numbers” on page A-1.) First, set the system to VGA mode by holdingdown both mouse buttons and turning on the machine. Then, reset themonitor type in the Setup Utility.If you need to set an option in the Setup Utility:1. Make sure the Advanced Diagnostics diskette is in Drive A.2. Power on the system unit.3. Press F1 while the memory count is running.You may be testing a digital monitor with a row of LEDs under the controlaccess door at the front of the monitor. If the monitor type is set to thewrong mode in the Setup Utility, the screen remains black and the first andlast LEDs flash.Note: Some monitors have a detachable system I/O signal cable betweenthe monitor and the system unit. Check the line voltage, power cord,and continuity for the system I/O signal cable before replacing theunit. See “Detachable Monitor I/O Signal Cable Connector TestPoints” on page 5-21 for pin identification.High voltage Northern and Southern Hemisphere monitors may comewith a voltage selector (110 V–220 V) switch. The 145-W powersupply may have a voltage selector (110 V–220 V) switch. Matchthe switch to the line voltage.Ensure the correct monitor frequency is set in the Setup Utility for themonitor used with the system (see “Using the Setup Utility” on page 1-16).If the monitor frequency is set incorrectly, the monitor may not be readablein certain modes. To determine the correct monitor frequency, look on themonitor for the part number. If the part number is not listed, see the productinformation shipped with the monitor. Set the monitor frequency equal to orless than the monitor’s maximum horizontal frequency (also known as thehorizontal scan rate). See “Refresh Rates and Monitor Frequencies” onpage 1-12.001– Power off the system unit and monitor.– Remove all adapter cards from the riser card.– Make sure the monitor I/O signal cable is properly connected to thesystem unit and monitor.(Step 001 continues)2-54