IBM 71453RU manual Operator information panel

DVD drive activity LED: When this LED is lit, it indicates that the DVD drive is in use.

USB 1 and 2 connectors: Connect USB devices to these connectors.

Scalability LED: This white LED is lit when the server is connected to another server in a multi-node configuration. This LED is lit and remains on after POST on the primary and secondary server.

Hard disk drive activity LED: When this LED is flashing, it indicates that the drive is in use.

Hard disk drive status LED: On some server models, each hot-swap hard disk drive has a status LED. When this LED is lit, it indicates that the drive has failed. If an optional IBM ServeRAID controller is installed in the server, when this LED is flashing slowly (one flash per second), it indicates that the drive is being rebuilt. When the LED is flashing rapidly (three flashes per second), it indicates that the controller is identifying the drive.

Operator information panel

The following illustration shows the controls and LEDs on the operator information panel.

Power-control button/power-on LED	Information LED
Ethernet icon LED	System-error LED

1 2

Power-control button cover Ethernet port activity LEDs Locator button/locator LED

The following controls and LEDs are on the operator information panel:

vPower-control button and power-on LED: Press this button to turn the server on and off manually or to wake the server from a reduced-power state. The states of the power-on LED are as follows:

Off: AC power is not present, or the power supply or the LED itself has failed.

Flashing rapidly (4 times per second): The server is turned off and is not ready to be turned on. The power-control button is disabled. In a fully configured server, it could take up to 8 minutes after the server is connected to ac power, before the power-control button becomes active.

Flashing slowly (once per second): The server is turned off and is ready to be turned on. You can press the power-control button to turn on the server.

Lit: The server is turned on.

Fading on and off: The server is in a reduced-power state. To wake the server, press the power-control button or use the IMM web interface. For information about logging on to the IMM web interface, see “Logging on to the IMM web interface” on page 106.

vEthernet icon LED: This LED lights the Ethernet icon.

14IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Installation and User's Guide