Light Path Diagnostics - Lenovo System x3250 M5 Installation And Service Manual

For additional information, see "Dynamic System Analysis" on page 124 and Appendix C "DSA
diagnostic test results" on page 549.
– DSA Preboot
DSA Preboot diagnostic program is stored in the integrated USB memory on the server. DSA Preboot
collects and analyzes system information to aid in diagnosing server problems, as well as offering a
rich set of diagnostic tests of the major components of the server. DSA Preboot collects the following
information about the server:
– Drive health information
– IMM2 configuration information
– IMM2 environmental information
– Installed hardware, including PCI and USB information
– Light path diagnostics status
– Microprocessor, input/output hub, and UEFI error logs
– Network interfaces and settings
– Option card driver and firmware information
– RAID controller configuration
– Service processor (Integrated Management Module II (IMM2)) status and configuration
– System configuration
– Vital product data, firmware, and UEFI configuration
DSA Preboot also provides diagnostics for the following system components (when they are installed):
1. Emulex 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
8. LSI controller
9. Broadcom network adapter
10. FusionIO storage
11. Intel GPU
12. Nvidia GPU
See "Running DSA Preboot diagnostic programs" on page 126 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 127 for more information.

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
operator information panel, then on the failed component. By viewing the LEDs in a particular order, you
can often identify the source of the error.
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Chapter 4 Troubleshooting
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