IBM 72335LU - System x3850 M2 User Manual page 23

v Power-control button cover: Slide this cover over the power-control button to
prevent the server from being turned off accidentally.
v Power-control button: Press this button to turn the server on and off manually.
v 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 an ac power source. When this LED is off, it indicates that
ac power is not present or the power supply or the LED itself has failed.
Note: If this LED is off, it does not mean that there is no electrical power in the
server. The LED might be burned out. To remove all electrical power from the
server, you must disconnect the power cords from the electrical outlets.
v Ethernet-icon LED: This LED lights the Ethernet icon.
v Ethernet activity LEDs: When these LEDs flash, they indicate that there is
activity between the server and the network on the indicated port.
v Locator LED: Use this LED to visually locate the server among other servers.
You can use IBM Director to light this LED remotely or press the locator button to
light the LED manually. This LED is also lit during startup.
In multi-node configurations, when this LED flashes, it indicates that the server is
the primary node. When this LED is lit continuously, it indicates that the server is
a secondary node.
v Locator button: Press this button to turn the locator LED on and off manually. In
multi-node configurations, press this button to turn the locator LED on and off in
all nodes in the configuration.
v Information LED: When this LED is lit, it indicates that there is a suboptimal
condition in the server and that light path diagnostics will light an additional LED
to help isolate the condition. This LED and LEDs on the light path diagnostics
panel remain lit until you resolve the condition or you press the remind button.
v 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.
Electrostatic-discharge connector: Connect an electrostatic-discharge wrist strap
to this connector.
Scalability LED: When this LED is lit, it indicates that an optional scalability key is
installed in the server, which enables support for connecting the server to other
servers to form multi-node configurations.
Chapter 1. The System x3850 M2 and System x3950 M2 server
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