IBM 866631Y Hardware Maintenance Manual - Page 19

Information LED panel, System error light

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Information LED panel:The lights on this panel give status information for the server. See "Information LED panel". Information LED panel The following illustration shows the status lights on the Information LED panel. POST-complete System power Hard disk drive activity OK 1 2 3 4 100 LINK TX MB OK RX System error Information Processor activity Ethernet speed Ethernet-link status Ethernet transmit/receive activity System power light: When this green light is on, power is present in the server. When this light flashes, the server is in standby mode (the system power supply is turned off and ac current is present). When this light is off, the power subsystem, the ac power, or a light has failed. Attention: If the system power light is off, it does not mean there is no electrical current present in the server. The light 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 supply. POST-complete light:This green light is on when the power-on self-test (POST) completes without any errors. Hard disk drive activity light: This green light flickers when there is activity on a hard disk drive. Information light: When this amber light is on, the server power supplies are nonredundant or some other noncritical event has occurred. A light on the diagnostic panel may also be on. The event is recorded in the Event log. See "Choices available from the Configuration/Setup main menu" on page 31 for information on viewing the Event log. System error light: This amber light is on when a system error occurs. A light on the diagnostics LED panel will also be on to further isolate the error. (For more information, see "Diagnostic panel LEDs" on page 16.) Ethernet transmit/receive activity light: When this green light is on, there is activity between the server and the network. Ethernet-link status light: When this green light is on, there is an active connection on the Ethernet port. General information 9

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Information LED panel:
The lights on this panel give status information for the
server. See “Information LED panel”.
Information LED panel
The following illustration shows the status lights on the Information LED panel.
100
MB
LINK
OK
TX
RX
OK
1
2
3
4
POST-complete
System power
Hard disk drive
activity
Processor
activity
Ethernet speed
Ethernet-link
status
Ethernet
transmit/receive
activity
Information
System error
System power light:
When this green light is on, power is present in the server.
When this light flashes, the server is in standby mode (the system power supply is
turned off and ac current is present). When this light is off, the power subsystem,
the ac power, or a light has failed.
Attention:
If the system power light is off, it does not mean there is no electrical
current present in the server. The light 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
supply.
POST-complete light:
This green light is on when the power-on self-test (POST)
completes without any errors.
Hard disk drive activity light:
This green light flickers when there is activity on a
hard disk drive.
Information light:
When this amber light is on, the server power supplies are
nonredundant or some other noncritical event has occurred. A light on the
diagnostic panel may also be on. The event is recorded in the Event log. See
“Choices available from the Configuration/Setup main menu” on page 31 for
information on viewing the Event log.
System error light:
This amber light is on when a system error occurs. A light on
the diagnostics LED panel will also be on to further isolate the error. (For more
information, see “Diagnostic panel LEDs” on page 16.)
Ethernet transmit/receive activity light:
When this green light is on, there is
activity between the server and the network.
Ethernet-link status light:
When this green light is on, there is an active
connection on the Ethernet port.
General information
9