Troubleshooting the system batteryPrerequisitesCAUTION: 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.NOTE: If the system is turned off for long periods of time (for weeks or months), the NVRAM maylose its system configuration information. This situation is caused by a defective battery.NOTE: Some software may cause the system time to speed up or slow down. If the system seemsto operate normally except for the time set in System Setup, the problem may be caused by asoftware, rather than by a defective battery.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.99
