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Troubleshooting Your System 117
Troubleshooting Power Supply
1
Reseat the power supply by removing and reinstalling it. See "Removing
the Power Supply" on page 99 and "Installing the Power Supply" on
page 100.
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.
If the problem persists, replace the faulty power supply.
2
If the problem persists, see "Getting Help" on page 135.
Troubleshooting System 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 came with the
product.
Ensure that none of the following conditions exist:
• System cover, cooling shroud, EMI filler panel, memory-module blank, or
back-filler bracket is removed.
• Ambient temperature is too high.
• External airflow is obstructed.
• The cooling fan is removed or has failed. See "Troubleshooting Cooling
Fan" on page 118.
• The expansion card installation guidelines have not been followed. See
"Expansion Card Installation Guidelines" on page 81.
Coaster_HOM.book Page 117 Monday, November 3, 2014 3:23 PM