110 Troubleshooting Your System6 Run the system board tests in the system diagnostics. See "Running theSystem Diagnostics" on page 121.If the tests fail, see "Getting Help" on page 129.Troubleshooting the System BatteryCAUTION: 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.NOTE: If the system is turned off for long periods of time (for weeks or months), theNVRAM may lose its system configuration information. This situation is caused by adefective battery.1 Re-enter the time and date through the System Setup program. See "Usingthe System Setup Program and UEFI Boot Manager" on page 35.2 Turn off the system and disconnect it from the electrical outlet for at leastone hour.3 Reconnect the system to the electrical outlet and turn on the system.4 Enter the System Setup program.If the date and time are not correct in the System Setup program, replacethe battery. See "Replacing the System Battery" on page 91.If the problem is not resolved by replacing the battery, see "Getting Help"on page 129.NOTE: Some software may cause the system time to speed up or slow down. If thesystem seems to operate normally except for the time kept in the System Setupprogram, the problem may be caused by software rather than by a defectivebattery.
