Maintenance and Troubleshooting 4-5Problems and SolutionsProblem Symptom SolutionNo power Power lamp on computer will notlight.Check that the power cord is plugged intothe AC connector on the computer.Check that the other end of the cord isplugged into a live properly grounded ACpower outlet.Check cable connections between thepower supply and the system board.Systematically eliminate possible shortedboards by removing cables and expansionboards.Check the +5 and +12 power supplyvoltages (see “Connector PinAssignments”). Measure voltages with thesystem board installed.Replace the power supply.Replace the system board.Power supplymalfunctionAny of the following conditionscan occur:Front panel lamps out, disketteand/or hard drives do not spin,monitor blank, interface ports notworking , and keyboard lamp outand/or cannot input from thekeyboard.Perform the first four checks in the solutionfor the “No power” problem in this table.Check power supply voltages. Voltagesshould be measured with a load on them(system board plugged in). See “ConnectorPin Assignments.”Replace the power supply.Operating system doesnot boot.Intermittent beeping at power on.Computer beeps more than onceand is unable to completebootup.Check system configuration (see “SetupUtility”).Check all jumper settings and verify thatdrives are enabled (see “Setup Utility”).Reseat DIMMs and option boards in theirconnectors. Inspect system board fordropped objects.Remove option boards and reboot.Replace system board.“Invalid Configuration” messagedisplayed.Press F2 to run Setup and correct theparameters.Replace the CMOS battery if the date andtime must be set each time the computer ispowered on.
