Lenovo System x3750 M4, Инструкция по установке и обслуживанию

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– Vital product data, firmware, and UEFI configuration
DSA Preboot also provides diagnostics for the following system components (when they are installed):
1. ML2 network adapter
2. IMM2 I2C bus
3. Light path diagnostics panel
4. Memory modules
5. Microprocessors
6. Optical devices (CD or DVD)
7. SAS or SATA drives
See “Running the DSA Preboot diagnostic programs” on page 177 for more information on running the
DSA Preboot program on the server.
• Troubleshooting by symptom
These tables list problem symptoms and actions to correct the problems. See “Troubleshooting by
symptom” on page 180 for more information.
Light path diagnostics
Use this information as an overview of light path diagnostics.
Light path diagnostics is a system of LEDs on various external and internal components of the server that
leads you to the failed component. When an error occurs, LEDs are lit along the path of the front panel, the
light path diagnostics panel, then on the failed component. By viewing the LEDs in a particular order, you
can often identify the source of the error.
When LEDs are lit to indicate an error, they remain lit when the server is turned off, provided that the server is
still connected to power and the power supply is operating correctly.
Before you work inside the server to view light path diagnostics LEDs, read “Safety” on page v and “Handling
static-sensitive devices” on page 39.
If an error occurs, view the light path diagnostics LEDs in the following order:
1. Look at the operator information panel on the front of the server:
• If the check log LED is lit, it indicates that information about an un-isolated fault condition in the
server is available in the IMM2 event log or in the system-event log.
• If the system-error LED is lit, it indicates that an error has occurred; go to step 2.
The following illustration shows the operator information panel.
Chapter 4
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Troubleshooting
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