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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 on the front I/O assembly, the rear
panel, the system board, and the failed component. By viewing the following LEDs, you can often identify the
system and device status and diagnose problems.
• "Front view" on page 11
• "Diagnostics panel" on page 23
• "LCD diagnostics panel/handset" on page 26
• "Rear view LEDs" on page 41
• "System board LEDs" on page 45
.
Chapter 5
Problem determination
401
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