158 Troubleshooting Your System
• Memory modules
• Hard-drive carriers
4
Ensure that all cables are properly connected.
5
Close the system. See "Closing the System."
6
Run the system board tests in the system diagnostics. See "Running the 
System Diagnostics."
If the tests fail, 
see "Getting Help."
Troubleshooting the System Battery 
1
Re-enter the time and date through the System Setup program. See "Using 
the System Setup Program and UEFI Boot Manager."
2
Turn off the system and disconnect it from the electrical outlet for at least 
one 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, replace 
the battery. See "System Battery."
  CAUTION: Many repairs may only be done by a certified service technician. You 
should only perform troubleshooting and simple repairs as authorized in your 
product documentation, or as directed by the online or telephone service and 
support team. Damage due to servicing that is not authorized by Dell is not covered 
by your warranty. Read and follow the safety instructions that came with the 
product.
If the problem is not resolved by replacing the battery, see "Getting Help."
Troubleshooting Power Supplies
  CAUTION: At least one power supply must be installed for the system to operate. 
Operating the system with only one power supply installed for extended periods of 
time without a power-supply blank installed in the PS2 power-supply bay can 
cause the system to overheat.
1
Identify the faulty power supply by the power supply's status indicator. See 
"Power Indicator Codes."