Steps1. Re-enter the time and date in System Setup.2. Turn off the system, and disconnect it from the electrical outlet for at least an hour.3. Reconnect the system to the electrical outlet, and turn on the system.4. Enter System Setup.If the date and time displayed in System Setup are not correct, check the System Error Log (SEL) forsystem battery messages.Next stepsIf the problem persists, see Getting Help.Troubleshooting power supply unitsCAUTION: Many repairs may only be done by a certified service technician. You should onlyperform troubleshooting and simple repairs as authorized in your product documentation, or asdirected by the online or telephone service and support team. Damage due to servicing that isnot authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the product.Troubleshooting power source problems1. Press the power button to ensure that your system is turned on. If the power indicator does not glowwhen the power button is pressed, press the power button firmly.2. Plug in another working PSU to ensure that the system board is not faulty.3. Ensure that no loose connections exist.For example, loose power cables.4. Ensure that the power source meets applicable standards.5. Ensure that there are no short circuits.6. Have a qualified electrician check the line voltage to ensure that it meets the required specifications.Power supply unit problems1. Ensure that no loose connections exist.For example, loose power cables.2. Ensure that the power supply handle/LED indicates that the power supply is working properly.For more information on power supply indicators, see Indicator codes for redundant power supplyunit.3. If you have recently upgraded your system, ensure that the power supply unit has enough power tosupport the new system.4. If you have a redundant power supply configuration, ensure that both the power supply units are ofthe same type and wattage.You may have to upgrade to a higher wattage power supply unit.5. Ensure that you use only power supply units with the Extended Power Performance (EPP) label onthe back.6. Reseat the power supply unit.NOTE: After installing a power supply unit, allow several seconds for the system to recognizethe power supply unit and determine if it is working properly.138
