Manual

168 Troubleshooting Your System
• Cables inside the system obstruct airflow.
• An individual cooling fan is removed or has failed. See "Troubleshooting a
Fan" on page 168.
• The expansion card installation guidelines have not been followed. See
"Expansion Card Installation Guidelines" on page 114.
Troubleshooting a Fan
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.
1 Open the system. See "Opening the System" on page 84.
CAUTION: The cooling fans are hot-swappable. To maintain proper cooling while
the system is on, only replace one fan at a time.
2 Locate the faulty fan indicated by the LCD panel or the diagnostic
software.
3 Remove and reseat the fan. See "Removing a Cooling Fan" on page 108
and "Installing a Cooling Fan" on page 110.
NOTE: Wait at least 30 seconds for the system to recognize the fan and
determine whether it is working properly.
4 If the problem is not resolved, install a new fan. See "Removing a Cooling
Fan" on page 108 and "Installing a Cooling Fan" on page 110.
If the replacement fan is working properly, close the system. See "Closing
the System" on page 85.
If the replacement fan does not operate,
see "Getting Help" on page 195.
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