142 Troubleshooting Your System• Processor and heat sink• Memory modules• Hard-drive brackets• Cooling shroud3 Ensure that all cables are properly connected.4 Close the system. See "Closing the System" on page 77.5 Reconnect the system to its electrical outlet and turn the system on,including any attached peripherals.6 Run the system board tests in the system diagnostics. See "Running theSystem Diagnostics" on page 153.If the tests fail, see "Getting Help" on page 161.Troubleshooting the System BatteryNOTE: 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 51.2 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 122.If the problem is not resolved by replacing the battery, see "Getting Help"on page 161.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.
