Table 4. Power-supply LEDsAC power-supply LEDsDescription Action NotesAC DC ErrorOff Off Off No ac power tothe server or aproblem with theac power source1. Check the ac power to the server.2. Make sure that the power cord isconnected to a functioning powersource.3. Turn the server off and then turn theserver back on.4. If the problem remains, replace thepower supply.This is a normalcondition when noac power is present.Off Off On No ac power tothe server or aproblem with theac power sourceand the powersupply haddetected aninternal problem1. Replace the power supply.2. Make sure that the power cord isconnected to a functioning powersource.This happens onlywhen a secondpower supply isproviding power tothe server.Off On Off Faulty powersupplyReplace the power supply.Off On On Faulty powersupplyReplace the power supply.On Off Off Power supplynot fully seated,faulty systemboard, or faultypower supply1. (Trained service technician only)Reseat the power supply.2. If a power channel error LED on thesystem board is not lit, replace thepower-supply (see the documentationthat comes with the power supply forinstructions).3. If a power channel error LED on thesystem board is lit, (trained servicetechnician only) replace the systemboard.Typically indicatesthat a power supplyis not fully seated.On Off orFlashingOn Faulty powersupplyReplace the power supply.On On Off NormaloperationOn On On Power supply isfaulty but stilloperationalReplace the power supply.The following table describes the problems that are indicated by variouscombinations of the power-supply LEDs on a dc power supply and suggestedactions to correct the detected problems.DC power-supply LEDsDescription Action NotesIN OK OUT OK Error (!)On On Off Normal operationChapter 1. The System x3650 M3 server 21
