Chapter 3. Troubleshooting; Start Here; Diagnosing A Problem; Copyright Lenovo - Lenovo NeXtScale nx360 M4 Installation And Service Manual

Chapter 3. Troubleshooting

This chapter describes the diagnostic tools and troubleshooting information that are available to help
you solve problems that might occur in the server.
If you cannot diagnose and correct a problem by using the information in this chapter, see "Getting help and
technical assistance" on page dccvi for more information.

Start here

You can solve many problems without outside assistance by following the troubleshooting procedures in
this documentation and on the World Wide Web.
This document describes the diagnostic tests that you can perform, troubleshooting procedures, and
explanations of error messages and error codes. The documentation that comes with your operating system
and software also contains troubleshooting information.

Diagnosing a problem

Before you contact IBM or an approved warranty service provider, follow these procedures in the order in
which they are presented to diagnose a problem with your server.
Step 1. Return the server to the condition it was in before the problem occurred.
If any hardware, software, or firmware was changed before the problem occurred, if possible,
reverse those changes. This might include any of the following items:
• Hardware components
• Device drivers and firmware
• System software
• UEFI firmware
• System input power or network connections
Step 2. View the light path diagnostics LEDs and event logs.
The server is designed for ease of diagnosis of hardware and software problems.
• Light path diagnostics LEDs: See Fan and power controller indicators, controls, and
connectors of the IBM NeXtScale n1200 Enclosure Type 5456 Installation and Service Guide for
information about using light path diagnostics LEDs.
• Event logs: See "Event logs" on page 53 for information about notification events and diagnosis.
• Software or operating-system error codes: See the documentation for the software or
operating system for information about a specific error code. See the manufacturer's website
for documentation.
Step 3. Run IBM Dynamic System Analysis (DSA) and collect system data.
Run Dynamic System Analysis (DSA) to collect information about the hardware, firmware, software,
and operating system. Have this information available when you contact IBM or an approved
warranty service provider. For instructions for running DSA, see the Dynamic System Analysis
Installation and User's Guide.
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