Dell POWEREDGE 1855 - Manual (Page 39)

14. Reconnect the power supply modules to their electrical outlets.
If the system does not start up properly, see " Getting Help ."
15. Run the Server Administrator diagnostics to confirm that the system is working properly (see " Running System Diagnostics ").
If the tests fail, see " Getting Help ."
Troubleshooting a Damaged System
Problem
l System was dropped or damaged
Action
1. Ensure that the following components are properly installed and connected:
l DRAC/MC module
l I/O modules
l Power supply modules
l Fan modules
l Server modules
2. Ensure that all cables are properly connected.
3. Ensure that all components are properly installed and free from damage.
4. Run the online diagnostics. See " Running System Diagnostics ."
If the tests fail, see " Getting Help ."
Troubleshooting System Components
The following procedures describe how to troubleshoot the following components:
l Power supply modules
l Fan modules
l DRAC/MC module
l Network switch module
Troubleshooting Power Supply Modules
Problem
l A power supply module is not operating properly
Action
1. Locate the faulty power supply module.
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 1200-W power supply modules require 180–264 V, and 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.