IBM DR550, Problem Determination And Service Manual

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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, refer
to the x3650 Problem Determination and Service Guide .
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, refer to the
x3650 Problem Determination and Service Guide .
Systems-management Ethernet connector:
Use this connector to connect the server
to a network for systems-management information control. This connector is active
only if you have installed a Remote Supervisor Adapter II SlimLine, and it is used
only by the Remote Supervisor Adapter II SlimLine.
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.
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.
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 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.
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).
Optional external SAS connector: Connect a serial-attached SCSI (SAS) device to
this connector.
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DR550 Version 4.5 Problem Determination and Service Guide