Troubleshooting Your System 151Troubleshooting Power Supplies1 Identify the faulty power supply by the power supply's fault indicator.See "Power Indicator Codes" on page 20.CAUTION: At least one power supply must be installed for the system to operate.Operating the system with only one power supply installed for extended periods oftime can cause the system to overheat.2 Reseat the power supply by removing and reinstalling it. See "PowerSupplies" on page 92.NOTE: After installing a power supply, allow several seconds for the systemto recognize the power supply and to determine if it is working properly. Thepower indicator turns green to signify that the power supply is functioningproperly.If the problem persists, replace the faulty power supply.3 If the problem persists, see "Getting Help" on page 167.Troubleshooting System Cooling ProblemsWARNING: Only trained service technicians are authorized to remove the systemcover and access any of the components inside the system. Before you begin thisprocedure, review the safety instructions that came with the systemEnsure that none of the following conditions exist:• System cover, cooling shroud, drive blank, or front or back filler panel isremoved.• Ambient temperature is too high.• External airflow is obstructed.• Cables inside the system obstruct airflow.• An individual cooling fan is removed or has failed. See "Troubleshooting aFan" on page 152.
