00000000
HDD
status
LED
System
error
LED
Power
LED
ID
LED
Figure 12. The LEDs on the system board
Server power features
When the server is connected to an ac power source but is not turned on, the operating system does not
run, and all core logic except for the TMM is shutdown.
However, the server can respond to requests from TMM, such as a remote request to turn on the server. The
power-on LED will not be lit when the server is connected to ac power but is not turned on.
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Lenovo ThinkServer sd350 Server Type 5493, Lenovo ThinkServer n400 Enclosure Type 5495Installation and Service Guide