Troubleshooting Your System 167
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 can cause the system to overheat.
1
Identify the faulty power supply by the power supply's fault indicator. See
"Power Indicator Codes" on page 21.
CAUTION: If troubleshooting a power supply mismatch error, replace only the
power supply with the flashing indicator. Swapping the opposite power supply to
make a matched pair can result in an error condition and unexpected system
shutdown.
2
Reseat the power supply by removing and reinstalling it. See "Removing a
Power Supply" on page 94 and "Installing a Power Supply" on page 95.
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.
If the problem persists, replace the faulty power supply.
3
If the problem persists, see "Getting Help" on page 195.
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, drive blank, memory-module blank, power-
supply blank, or back filler bracket is removed.
• Heat-sink blank is removed (in single-processor configurations).
• Ambient temperature is too high. See your
Getting Started Guide
for your
system’s operating temperature requirements.
• External airflow is obstructed.
book.book Page 167 Thursday, February 18, 2010 2:06 PM
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