Manual

Troubleshooting 55
Troubleshooting
Pre-diagnostic steps
WARNING: To avoid potential problems, ALWAYS read the warnings and cautionary
information in the server documentation before removing, replacing, reseating, or modifying
system components.
IMPORTANT: This guide provides information for multiple servers. Some information may not
apply to the server you are troubleshooting. Refer to the server documentation for information on
procedures, hardware options, software tools, and operating systems supported by the server.
1. Review the important safety information (on page 55).
2. Gather symptom information (on page 57).
3. Prepare the server for diagnosis.
4. Use the Start diagnosis flowchart (on page 61) to begin the diagnostic process.
Important safety information
Familiarize yourself with the safety information in the following sections before troubleshooting the server.
Important safety information
Before servicing this product, read the Important Safety Information document provided with the server.
Symbols on equipment
The following symbols may be placed on equipment to indicate the presence of potentially hazardous
conditions.
This symbol indicates the presence of hazardous energy circuits or electric shock
hazards. Refer all servicing to qualified personnel.
WARNING: To reduce the risk of injury from electric shock hazards, do not open this
enclosure. Refer all maintenance, upgrades, and servicing to qualified personnel.
This symbol indicates the presence of electric shock hazards. The area contains no user
or field serviceable parts. Do not open for any reason.
WARNING: To reduce the risk of injury from electric shock hazards, do not open this
enclosure.
This symbol on an RJ-45 receptacle indicates a network interface connection.
WARNING: To reduce the ris
k of electric shock, fire, or damage to the equipment, do
not plug telephone or telecommunications connectors into this receptacle.