Lenovo System x3550 M5, Installation And Service Manual

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System
error
LED System
locator
LED
Power
LED
DIMM 19-24
error LEDs
DIMM 7-18
error LEDs
DIMM 1- 6
error LEDs
Coin-cell-battery
error LED
IMM2
heartbeat
LED
ServeRAID error LED
Microprocessor 1
error LED
Microprocessor 2
error LED
Fan 1
error LED Fan 2
error LED Fan 3
error LED Fan 5
error LED Fan 6
error LED Fan 7
error LED Fan 8
error LED
Figure 28. System-board LEDs
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 integrated management module is shut down.
However, the server can respond to requests from IMM, such as a remote request to turn on the server. The
power-on LED flashes to indicate that the server is connected to an ac power source but is not turned on.
Turning on the server
Use this information to turn on the server.
Approximately five seconds after the server is connected to power, one or more fans might start running
to provide cooling while the server is connected to power and the power-on button LED will blink quickly.
Approximately 20 seconds after the server is connected to power, the power-control button becomes active
(the power-on LED will blink slowly), and one or more fans might start running to provide cooling while the
server is connected to power. You can turn on the server by pressing the power-control button.
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Lenovo System x3550 M5 Installation and Service Guide