IBM 7378, Problem Determination And Service Manual

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from the production network. You can use the Setup utility to configure the
server to use a dedicated systems management network or a shared
network.
USB connectors
Connect USB devices to these connectors.
Ethernet connectors
Use either of these connectors to connect the server to a network. When
you use the Ethernet 1 connector, the network can be shared with the IMM
through a single network cable.
Ethernet transmit/receive activity LED
This LED is on the Ethernet connector. When this LED is lit, it indicates that
there is activity between the server and the network.
Ethernet link status LED
This LED is on the Ethernet connector. When this LED is lit, it indicates that
there is an active connection on the Ethernet port.
Power-supply LEDs
The following illustration shows the locations of the 670-watt power supply LEDs.
Power cord
connector
AC power LED
DC power LED
Fault (error) LED
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs. For more information about solving
power-supply problems, see “Power-supply LEDs” on page 96.
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IBM System x3400 M3 Types 7378 and 7379: Problem Determination and Service Guide