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 5 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 5 to 10 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.
The server can also be turned on in any of the following ways:
v If a power failure occurs while the server is turned on, the server will restart
automatically when power is restored.
v If your operating system supports the Wake on LAN feature, the Wake on LAN
feature can turn on the server.
System
error
LED
System
locator
LED
Power
LED
DIMM 19-24
error LEDs
DIMM 7-18
error LEDs
DIMM 1- 6
error LEDs
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 4
error LED
Fan 5
error LED
Fan 6
error LED
Fan 7
error LED
Fan 8
error LED
Figure 25. System-board LEDs
Chapter 1. The IBM System x3550 M5 server 31
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