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For information about light path diagnostics, see the System x3550 Problem
Determination and Service Guide on the IBM System x Documentation CD.
Rear view
The following illustration shows the connectors and LEDs on the rear of the server.
v PCI slot 1: Insert a PCI Express type adapter into this slot.
v PCI slot 2: Insert a PCI Express type adapter into this slot. You can purchase an
v Power connector: Connect the power cord to this connector.
v AC power LED: Each hot-swap power supply has an ac power LED and a dc
v DC power LED: Each hot-swap power supply has a dc power LED and an ac
v System-error LED: When this LED is lit, it indicates that a system error has
v Power-on LED: When this LED is lit and not flashing, it indicates that the server
v System-locator LED: Use this LED to visually locate the server among other
v Video connector: Connect a monitor to this connector. The video connectors on
v Serial connector: Connect a 9-pin serial device to this connector. The serial port
v USB connectors: Connect a USB device, such as a USB mouse, keyboard, or
v Systems-management Ethernet connector: Use this connector to connect the
PCI slot 1
Ethernet 1
USB 2
Ethernet 2
USB 1
Systems
management
Ethernet connector
optional PCI-X riser card assembly to convert this slot to accept a PCI-X adapter.
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.
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.
occurred. An LED on the light path diagnostics panel is also lit to help isolate the
error.
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.
servers. You can use IBM Director to light this LED remotely.
the front and rear of the server can be used simultaneously.
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).
other device to any of these connectors.
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.
Power connector
PCI slot 2
Video
Power-on LED
connector
System-locator LED
System-error LED
Serial
connector
Chapter 1. The System x3550 Type 7978 server
AC Power
LED
DC Power
LED
13
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