00000000
HDD
status
LED
System
error
LED
Power
LED
ID
LED
Figure 13. The LEDs on the system board
The server is designed so that LEDs remain lit when the server is connected to an ac power source but is
not turned on, provided that the power supply is operating correctly. This feature helps you to isolate the
problem when the operating system is shut down.
Note:
When you disconnect the power source from the server, you lose the ability to view the LEDs because
the LEDs are not lit when the power source is removed. Before you disconnect the power source, make
a note of which LEDs are lit, including the LEDs that are lit on the operation information panel and LEDs
inside the server on the system board.
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Lenovo ThinkServer sd350 Server Type 5493, Lenovo ThinkServer n400 Enclosure Type 5495Installation and Service Guide
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