IBM 8668 Hardware Maintenance Manual - Page 19

Operator information panel, Ethernet transmit/receive activity light

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Operator information panel The following illustration shows the location of the lights on the operator information panel on the front of the server (see "Server controls and indicators" SCSI hard Power-on POST disk drive Information light complete light in-use light light OK 100 LINK TX MB OK RX Ethernet Ethernet link Ethernet transmit/ on page 7). speed light status light receive activity light System-error light Power-on light: This green LED lights when system power is present in the server. When this light flashes, the server is in Standby mode (the system power supply is turned off and current is present). If this light is not on, the power cord is not connected, the power supply has failed, or this LED has failed. POST complete light: This green LED lights when the server completes the power-on self-test (POST). SCSI hard disk drive in-use light: This green LED lights when there is activity on a hard disk drive. Information light: This amber LED lights when the information log contains information about certain conditions in your server that might affect performance. For example, the light will be on if your server has multiple power supplies and does not have redundant power. An LED on the diagnostic panel on the system board will also be on. System-error light: This amber LED lights when a system error occurs. An LED on the diagnostic panel on the system board may also be on to further isolate the error. See "Identifying problems using status LEDs" on page 18. Ethernet speed light: This green LED lights when the Ethernet LAN speed is 100 Mbps during typical operation, when the system is powered off the LED remains lit. Ethernet link status light: This green LED lights when there is an active connection on the Ethernet port during typical operation, when the system is powered off the LED remains lit. Ethernet transmit/receive activity light: This green LED lights when there is transmit or receive activity to or from the server. General information 11

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Operator information panel
The following illustration shows the location of the lights on the operator
information panel on the front of the server (see “Server controls and indicators”
on page 7).
OK
100
MB
LINK
OK
TX
RX
Power-on
light
POST
complete light
SCSI hard
disk drive
in-use light
Information
light
System-error
light
Ethernet
speed light
Ethernet link
status light
Ethernet transmit/
receive activity light
Power-on light:
This green LED lights when system power is present in the server.
When this light flashes, the server is in Standby mode (the system power supply is
turned off and current is present). If this light is not on, the power cord is not
connected, the power supply has failed, or this LED has failed.
POST complete light:
This green LED lights when the server completes the
power-on self-test (POST).
SCSI hard disk drive in-use light:
This green LED lights when there is activity on
a hard disk drive.
Information light:
This amber LED lights when the information log contains
information about certain conditions in your server that might affect performance.
For example, the light will be on if your server has multiple power supplies and
does not have redundant power. An LED on the diagnostic panel on the system
board will also be on.
System-error light:
This amber LED lights when a system error occurs. An LED on
the diagnostic panel on the system board may also be on to further isolate the
error. See “Identifying problems using status LEDs” on page 18.
Ethernet speed light:
This green LED lights when the Ethernet LAN speed is 100
Mbps during typical operation, when the system is powered off the LED remains
lit.
Ethernet link status light:
This green LED lights when there is an active
connection on the Ethernet port during typical operation, when the system is
powered off the LED remains lit.
Ethernet transmit/receive activity light:
This green LED lights when there is
transmit or receive activity to or from the server.
General information
11