Troubleshooting Your System 159CAUTION: If troubleshooting a power supply mismatch error, replace only thepower supply with the flashing indicator. Swapping the opposite power supply tomake a matched pair can result in an error condition and unexpected systemshutdown. To change from a High Output configuration to an Energy Smartconfiguration or vice versa, you must power down the system.2 Reseat the power supply by removing and reinstalling it. See "Removing aPower Supply" and "Replacing a Power Supply."NOTE: After installing a power supply, allow several seconds for the systemto recognize the power supply and to determine if it is working properly. Thestatus indicator turns green to signify that the power supply is functioningproperly.If the problem persists, replace the faulty power supply with the same typeof power supply.3 If the problem persists, see "Getting Help."Troubleshooting System Cooling ProblemsCAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not coveredby your warranty. Read and follow the safety instructions that came with theproduct.Ensure that none of the following conditions exist:• System cover, cooling shroud, drive blank, power supply blank (in singlepower supply configurations), or front or back filler panel is removed.• FAN5 blank or heat sink blank is removed in single-processorconfigurations.• The expansion card installation guidelines have not been followed. See"Expansion Card Installation Guidelines."
