Server Power Features; Turning On The Server - IBM System x3650 Installation Manual

Ethernet link LEDs: When these LEDs are lit, they indicate that there is an active
link connection on the 10BASE-T, 100BASE-TX, or 1000BASE-TX interface for the
Ethernet port.
Ethernet connectors: Use either of these connectors to connect the server to a
network.
USB connectors: Connect a USB device, such as USB mouse, keyboard, or other
USB device, to any of these connectors.
Video connector: Connect a monitor to this connector. The video connectors on
the front and rear of the server can be used simultaneously.
System-error LED: When this LED is lit, it indicates that a system error has
occurred. An LED on the light path diagnostics panel is also lit to help isolate the
error.
System-locator LED: Use this LED to visually locate the server among other
servers. You can use IBM Director to light this LED remotely.
Power-on LED: When this LED is lit and not flashing, it indicates that the server is
turned on. When this LED is flashing, it indicates that the server is turned off and
still connected to a power source. When this LED is off, it indicates that power is
not present, or the power supply or the LED itself has failed.
Serial connector: Connect a 9-pin serial device to this connector. The serial port is
shared with the baseboard management controller (BMC). The BMC can take
control of the shared serial port to perform text console redirection and to redirect
serial traffic, using Serial over LAN (SOL).
SAS connector: Connect a serial-attached SCSI (SAS) device to this connector.

Server power features

When the server is connected to a power source but is not turned on, the operating
system does not run, and all core logic except for the service processor (the
baseboard management controller or optional Remote Supervisor Adapter II
SlimLine) is shut down; however, the server can respond to requests from the
service processor, such as a remote request to turn on the server. The power-on
LED flashes to indicate that the server is connected to power but is not turned on.
Attention:
IBM service technicians are authorized to connect or disconnect power to the dc
power supply. See the documentation that comes with each dc power supply.

Turning on the server

Approximately 5 seconds after the server is connected to power, the power-control
button becomes active, and one or more fans might start running to provide cooling
while the server is connected to power. You can turn on the server and start the
operating system 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
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IBM System x3650 Type 7979: Installation Guide
In a dc power environment, only trained service personnel other than
automatically when power is restored.