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Service bulletins
Lenovo continually updates the support website with the latest tips and techniques that you can use to solve
problem that you might have with the Lenovo NeXtScale nx360 M5 compute node server.
To find service bulletins that are available for the Lenovo NeXtScale nx360 M5 compute node server, go to
http://www.lenovo.com/support and search for Type 5465, and retain.
Checkout procedure
The checkout procedure is the sequence of tasks that you should follow to diagnose a problem in the server.
About the checkout procedure
Before you perform the checkout procedure for diagnosing hardware problems, review the following
information:
• Read the safety information that begins on page "Safety" on page v.
• Lenovo Dynamic System Analysis (DSA) provides the primary methods of testing the major components
of the server, such as the system board, Ethernet controller, keyboard, mouse (pointing device), serial
ports, and hard disk drives. You can also use them to test some external devices. If you are not sure
whether a problem is caused by the hardware or by the software, you can use the diagnostic programs to
confirm that the hardware is working correctly.
• When you run DSA, a single problem might cause more than one error message. When this happens,
correct the cause of the first error message. The other error messages usually will not occur the next
time you run DSA.
Important: If multiple error codes or light path diagnostics LEDs indicate a microprocessor error, the
error might be in the microprocessor or in the microprocessor socket. See "Microprocessor problems" on
page 67 for information about diagnosing microprocessor problems.
• Before you run DSA, you must determine whether the failing server is part of a shared hard disk drive
cluster (two or more servers sharing external storage devices). If it is part of a cluster, you can run all
diagnostic programs except the ones that test the storage unit (that is, a hard disk drive in the storage
unit) or the storage adapter that is attached to the storage unit. The failing server might be part of a
cluster if any of the following conditions is true:
– You have identified the failing server as part of a cluster (two or more servers sharing external storage
devices).
– One or more external storage units are attached to the failing server and at least one of the attached
storage units is also attached to another server or unidentifiable device.
– One or more servers are located near the failing server.
Important: If the server is part of a shared hard disk drive cluster, run one test at a time. Do not run
any suite of tests, such as "quick" or "normal" tests, because this might enable the hard disk drive
diagnostic tests.
• If the server is halted and a POST error code is displayed, see Appendix B "UEFI (POST) error codes" on
page 805. If the server is halted and no error message is displayed, see "Troubleshooting by symptom"
on page 63 and "Solving undetermined problems" on page 77.
• For information about power-supply problems, see "Solving power problems" on page 75, "Power
problems" on page 71, and "Power-supply LEDs" on page 55.
• For intermittent problems, check the event log; see "Event logs" on page 58 and Appendix C "DSA
diagnostic test results" on page 829.
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Lenovo NeXtScale nx360 M5 Installation and Service Guide
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Table of Contents
Troubleshooting
