Diagnostic Tools - Lenovo System x3750 M4 Installation And Service Manual

d. Check all cables and power cords.
e. Set all display controls to the middle positions.
f. Turn on all external devices.
g. Turn on the server. If the server does not start, see "Troubleshooting by symptom" on page 180.
h. Check the system-error LED on the operator information panel. If it is lit, check the light path
diagnostics LEDs (see "Light path diagnostics" on page 163).
i. Check for the following results:
• Successful completion of POST (see "POST" on page 176 for more information)
• Successful completion of startup, which is indicated by a readable display of the
operating-system desktop
Step 3. Is there a readable image on the monitor screen?
• No: Find the failure symptom in "Troubleshooting by symptom" on page 180; if necessary, see
"Solving undetermined problems" on page 198.
• Yes: Run DSA (see "Running the DSA Preboot diagnostic programs" on page 177).
– If DSA reports an error, follow the instructions in Appendix B "DSA diagnostic test results" on
page 319.
– If DSA does not report an error but you still suspect a problem, see "Solving undetermined
problems" on page 198.

Diagnostic tools

This section describes the available tools to assist you when diagnosing system errors.
Note: This documentation includes references to IBM web sites and information about obtaining service.
IBM is Lenovo's preferred service provider for the System x products.
The following tools are available to help you diagnose and solve hardware-related problems:
• Light path diagnostics
Use light path diagnostics to diagnose system errors quickly. See "Light path diagnostics" on page 163
for more information.
• Event logs
The event logs list the error codes and messages that are generated when an error is detected for the
subsystems IMM2, POST, DSA, and the server baseboard management controller. See "Event logs" on
page 173 for more information.
• Integrated management module II
The integrated management module II (IMM2) combines service processor functions, video controller,
and remote presence and blue-screen capture features in a single chip. The IMM2 provides advanced
service-processor control, monitoring, and alerting function. If an environmental condition exceeds a
threshold or if a system component fails, the IMM2 lights LEDs to help you diagnose the problem, records
the error in the IMM2 event log, and alerts you to the problem. Optionally, the IMM2 also provides a virtual
presence capability for remote server management capabilities. The IMM2 provides remote server
management through the following industry-standard interfaces:
– Intelligent Platform Management Protocol (IPMI) version 2.0
– Simple Network Management Protocol (SNMP) version 3
– Common Information Model (CIM)
– Web browser
.
Chapter 4 Troubleshooting
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