Ibm xSeries 235 User Manual download pdf (Page 23)

PCI-X slot attention LED: This green LED flashes approximately once per second

when it is on. This LED is visible from the rear of the server and from inside the

server. The meaning of the attention LED is defined by your operating system. For

an illustration showing this LED on the system board, see the Option Installation

Guide on the IBM xSeries Documentation CD. For additional information, see the

“LEDs for Active PCI slots” in the Hardware Maintenance Manual and

Troubleshooting Guide on the IBM xSeries Documentation CD.

NMI button: The Non-Maskable Interrupt (NMI) button is for service use only.

DC power LED: This green LED provides status information about the power

supply. During typical operation, both the ac and dc power LEDs are on. For any

other combination of LEDs, see the Hardware Maintenance Manual and

Troubleshooting Guide on the IBM xSeries Documentation CD.

AC power LED: This green LED provides status information about the power

supply. During typical operation, both the ac and dc power LEDs are on. For any

other combination of LEDs, see the Hardware Maintenance Manual and

Troubleshooting Guide on the IBM xSeries Documentation CD.

Operator information panel

The following illustration shows the status LEDs on the operator information panel

on the front of the server.

Power-on

LED

POST-

complete LED

Hard disk drive

activity LED

Information

LED

System-

error LED

Ethernet transmit/

receive activity LED

Important: If the power-on LED is off, it does not mean there is no electrical

current present in the server. The LED might be burned out. To remove

all electrical current from the server, you must unplug the server power

cords from the electrical outlets or from the uninterruptible power

device.

Power-on LED: When this green LED is on, power is present in the server.

When this LED flashes, the server is in Standby mode (the system operating

system is turned off and ac current is present). When this LED is off, the power

subsystem, the ac power, or an LED has failed.

POST-complete LED: This green LED is on when POST is completed without

any errors.

Hard disk drive activity LED: This green LED flickers when there is activity on

a hard disk drive.

Information LED: When this amber LED is on, the server power supplies are

nonredundant, or some other noncritical event has occurred. The event is

recorded in the Error log. See “Choices available from the Configuration/Setup

main menu” on page 16 for instructions for viewing the Error log. Check the

diagnostic LED panel for more detailed information (see the Hardware

Maintenance Manual and Troubleshooting Guide on the IBM xSeries

Documentation CD).

Chapter 1. Introducing the IBM xSeries 235 Type 8671 server 11

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