Owners Manual

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 are shipped with your product.
The following sections provide information on troubleshooting power source and power supply units problems.
Troubleshooting power source problems
Steps
1. Press the power button to ensure that your system is turned on. If the power indicator does not glow when the power button is
pressed, press the power button firmly.
2. Plug in another working power supply unit 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 needed specifications.
Power supply unit problems
Steps
1. Ensure that no loose connections exist.
For example, loose power cables.
2. Ensure that the power supply unit (PSU) handle or LED indicates that the PSU is working properly.
For more information about PSU indicators, see the Power indicator codes section.
3. If you have recently upgraded your system, ensure that the PSU has enough power to support the new system.
4. If you have a redundant PSU configuration, ensure that both the PSUs are of the same type and wattage.
You may have to upgrade to a higher wattage PSU.
5. Ensure that you use only PSUs with the Extended Power Performance (EPP) label on the back.
6. Reseat the PSU.
NOTE:
After installing a PSU, allow several seconds for the system to recognize the PSU and determine if it is
working properly.
If the problem persists, see the Getting help section.
Related References
Getting help on page 143
Troubleshooting cooling problems
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 are shipped with your product.
Ensure that the following conditions exist:
• System cover, cooling shroud, EMI filler panel, memory module blank, or back filler bracket is not removed.
• Ambient temperature is not higher than the system specific ambient temperature.
• External airflow is not obstructed.
• A cooling fan is not removed or has not failed.
• The expansion card installation guidelines have been followed.
Additional cooling can be added by one of the following methods:
From the iDRAC web GUI:
136
Troubleshooting your system