Troubleshooting the power supply, Troubleshooting system cooling problems, Troubleshooting a fan – Dell PowerEdge SC 420 User Manual
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If the problem is not resolved by replacing the battery, see "
Getting Help
."
Troubleshooting the Power Supply
Problem
l
Power indicator is not lit.
Action
1.
Ensure that the power cable is attached to the system and the cable is connected to an electrical outlet.
2.
Turn off the attached peripherals, and disconnect the system from the electrical outlet.
3.
Open the system. See "Opening the System."
4.
Locate the power supply.
5.
Ensure that the power supply is properly installed by removing and reinstalling it. See "
Power Supply
" in "Installing System Options."
6.
If the problem is resolved, close the system. See "
If the problem persists, remove the faulty power supply. See "
Removing the Power Supply
" in "Installing System Options."
7.
Install a new power supply. See "
Installing the Power Supply
" in "Installing System Options."
If the problem persists, see "
Getting Help
."
Troubleshooting System Cooling Problems
Problem
l
Systems management software issues a fan-related error message.
Action
Ensure that none of the following conditions exist:
l
Ambient temperature is too high.
l
External airflow is obstructed.
l
Cables inside the system obstruct airflow.
l
Processor heat sink is not installed properly. See "
Processor
" in "Installing System Options."
l
The processor cooling fan is not installed properly or has failed. See "
."
Troubleshooting a Fan
NOTE:
Some software may cause the system time to speed up or slow down. If the system seems to operate normally except for the time kept in the
System Setup program, the problem may be caused by software rather than by a defective battery.
CAUTION:
See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting
against electrostatic discharge.
NOTE:
After installing a power supply, allow several seconds for the system to recognize the power supply and to determine if it is working
properly. The power indicator turns green to signify that the power supply is functioning properly. See "
Front-Panel Indicators and Features
" in
"Indicators, Messages, and Codes."