# Troubleshooting

There are several ways to troubleshoot your server.

> CAUTION: Do not attempt to service the system except as explained in the documentation. Only trained service technicians should remove the system cover to access any of the internal components. Refer to the documentation for your server for complete safety information before attempting to service your system.

Visually Inspecting Your System

Improperly set controls and loose or improperly connected cables are common causes of problems with hardware components. When investigating a system problem, first check all the external switches, controls, and cable connections. If this does not resolve your problem, then visually inspect the system's interior hardware for problems such as a loose card, cable connector, or mounting screw. Refer to Visual System Inspection for instructions about how to verify that your hardware components are properly installed.

Troubleshooting Generic Problem Types

If you are experiencing a problem of a specific type with your system, refer to the following troubleshooting information to determine the exact cause of the problem:

- Temperature
- Fan Speed
- Voltage
- System Power
- Service Processor Networking
- Noises

You can also use the Troubleshooting Dump Utility (TDU) which captures the following information:

- System state table (SST)
- Hardware and software component version numbers
- Machine check register values
- CPU trace buffers
- CPU configuration space registers (CSRs)
- Event log file
- The last good configuration (LGC)

Troubleshooting Hardware and Software Problems

If you have not resolved your problem after visually inspecting your system and are unsure of the specific problem type, verify that the software and hardware components are operating correctly:

Software:

- Software
- BIOS
- Operating System

Hardware Components:

- SCSI Backplane
- CD-ROM
- CPU (Central Processing Unit)
- Disk
- Fan
- Floppy Disk Drive
- Front panel
- Memory
- Motherboard
- Power Supply
- Server
- VRM (Voltage Regulator Modules)
- Unknown components

Related Topics

Using the Service Processor SSH Console

Glossary