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DELL 1955 User Guide

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Troubleshooting Your System
Action
 
NOTICE: 
The power-supply modules are hot-pluggable. Remove and replace only one power-supply module at a 
time in a system that is turned on. Leave a failed power-supply module installed in the chassis until you are ready to 
replace it. Operating the system with a power-supply module removed for extended periods of time can cause the 
system to overheat. 
 
NOTE: 
The 2100-W power supply modules require 170-264 V to operate. If they are plugged into 110-V electrical 
outlets, the power supply modules do not power up. 
1 Locate the faulty power supply module.
The power supply's fault indicator is amber if AC power is available. See Figure 1-6.
If no indicators are lit, ensure that AC power is available from the electrical outlet and that the power 
cable is properly connected to the power supply module. 
 
NOTE: 
After installing a new power supply, allow several seconds for the system to recognize the power 
supply and determine whether it is working properly. The power supply DC power indicator turns green if the 
power supply is functioning properly. See Figure 1-6.
technical assistance.
Troubleshooting Fan Modules
Problem
•
A fan is not operating properly
Action
 
NOTICE: 
The fan modules are hot-pluggable. Remove and replace only one fan module at a time in a system that is 
turned on. Operating the system with a fan module removed for extended periods of time can cause the system to 
overheat.
1 Locate the faulty fan. 
Each fan module has indicators that identify a faulty fan. See Figure 1-7.