Dell PowerVault 725N (Rackmount NAS Appliance) - Manual (Page 25)

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Troubleshooting Your System
Dell™ PowerVault™ 725N Systems Installation and Troubleshooting Guide
If your system is not working as expected, begin troubleshooting using the procedures in this section. This section guides you through initial checks and
procedures that can solve basic system problems and provides troubleshooting procedures for components inside the system. Before you start any of the
procedures in this section, perform the following steps:
Read " Running System Diagnostics " for information about running diagnostics.
Safety First—For You and Your System
The procedures in this document require that you remove the system cover and work inside the system. While working inside the system, do not attempt to
service the system except as explained in this guide and elsewhere in your system documentation. Always follow the instructions closely. Ensure that you
review all of the procedures in "Safety Instructions" in your System Information Guide.
Working inside the system is safe—if you observe the following precautions.
External Connections
Improperly set switches, controls, and loose or improperly connected cables are the most likely source of problems with the system and attached peripherals.
A quick check of all the switches, controls, and cable connections can easily solve many of these problems. See your User's Guide for the location of back-panel
features and connectors. See "
I/O Connectors " for more information about the functionality of each connector type.
Checking Specific System Problems
1. Turn off the system and attached peripherals. Disconnect all the power cables from their electrical outlets.
2. If the system is connected to a power distribution unit (PDU), turn the PDU off and then on again.
If the system is not receiving power, plug it into another electrical outlet. If it still is not receiving power, try another PDU.
3. Reconnect the system to the electrical outlet or PDU.
Startup Routine
It is important to look and listen to your system when trying to determine the source of a problem. If during system startup you hear beeps, see error
messages, or see LED indicators flashing, there may be a problem with the system or one of its components. For more information, see "
Indicators, Messages,
and Codes ."
Removing and Replacing the Front Panel
To access the hard drives, you must first remove the system's front panel. To remove the front panel, push the front panel latches inward and pull the panel
away from the system. See
Figure 4 -1 .
Figure 4-1. Removing the Front Panel
Safety First—For You and Your System Troubleshooting a Damaged System
External Connections Troubleshooting the System Battery
Checking Specific System Problems Troubleshooting the Power Supply
Startup Routine Troubleshooting the Cooling Fans
Removing and Replacing the Front Panel Troubleshooting an Expansion Card
Removing and Replacing the System Cover Troubleshooting System Memory
Checking the Equipment Troubleshooting the System Board
Troubleshooting Hard Drives Recovering the System
Inside the System Changing or Clearing the Supervisor Password
Troubleshooting a Wet System Disabling a Forgotten Password
CAUTION: Read the "Safety Instructions" in your System Information Guide.
NOTE: While it is recommended that you use a keyboard, mouse, and monitor to troubleshoot the system, you can also use console redirection from a
client system connected by serial cable to the NAS system. For more information, see " Using Console Redirection ."
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting
against electrostatic discharge.