IBM 79463AU, Installation And User Manual

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The following illustration shows the LEDs on a dc power supply.
-48V return Ground -48V
Power input LED
Power output LED
Power error LED
v Ethernet activity LEDs: When these LEDs are lit, they indicate that the server is
transmitting to or receiving signals from the Ethernet LAN that is connected to
the Ethernet port.
v
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.
v
AC power LED: Each hot-swap power supply has an ac power LED and a dc
power LED. When the ac power LED is lit, it indicates that sufficient power is
coming into the power supply through the power cord. During typical operation,
both the ac and dc power LEDs are lit. For any other combination of LEDs, see
the
Problem Determination and Service Guide on the IBM System x
Documentation CD.
v DC power LED: Each hot-swap power supply has a dc power LED and an ac
power LED. When the dc power LED is lit, it indicates that the power supply is
supplying adequate dc power to the system. During typical operation, both the ac
and dc power LEDs are lit. For any other combination of LEDs, see the
Problem
Determination and Service Guide on the IBM System x Documentation CD.
v
Power-supply error LED: When the power-supply error LED is lit, it indicates
that the power supply has failed.
Note: Power supply 1 is the default/primary power supply. If power supply 1
fails, you must replace the power supply immediately.
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.
v Power-on LED: When this LED is lit and not flashing, it indicates that the server
is turned on. The states of the power-on LED are as follows:
Off: Power is not present, or the power supply or the LED itself has failed.
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IBM System x3550 M2 Types 4198 and 7946: Installation and User’s Guide