Internal Connectors, Leds, And Jumpers - Lenovo ThinkServer RD120 Hardware Maintenance Manual

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 "Power-supply
LEDs" on page 167.
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. The video connectors on
the front and rear of the server can be used simultaneously.
System-error LED: When this LED is lit, it indicates that a system error has
occurred. An LED on the Easy LED Diagnostics panel is also lit to help isolate the
error.
System-locator LED: Use this LED to visually locate the server among other
servers.
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 a power source. When this LED is off, it indicates that 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).
SAS connector: Connect a serial-attached SCSI (SAS) device to this connector.

Internal connectors, LEDs, and jumpers

The illustrations in this section show the LEDs, connectors, and jumpers on the
internal boards. The illustrations might differ slightly from your hardware.
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ThinkServer RD120 server Machine Types 6444, 6445, 6446, and 6447: Hardware Maintenance Manual