Sun Fire V490 LEDs

Several LED status indicators on both the front and back panels provide general system status, alert you to system problems, and help you to determine the location of system faults. During system startup, LEDs are toggled on and off to verify that each one is working correctly.

Front Panel LEDs

Refer to the Sun Fire V490 Front Open View for front panel LED locations.

At the top left of the system as you look at its front are three general system LEDs. Two of these LEDs, the system Fault LED and the Power/OK LED, provide a snapshot of the overall system status. One LED--the Locator LED--helps you to locate a specific system quickly, even though it may be one of dozens or even scores of systems in a room. The front panel Locator LED is at the far left in the cluster. The Locator LED is lit by command from the administrator.

Other LEDs located on the front of the system work in conjunction with specific fault LED icons. For example, a fault in the disk subsystem illuminates a disk drive fault LED in the center of the LED cluster that is next to the affected disk drive. Since all front panel status LEDs are powered by the system's 5-volt standby power source, fault LEDs remain lit for any fault condition that results in a system shutdown.

System LEDs

Icon	Name	LED Function
	Locator	This white LED is lit by Sun Management Center or Sun Remote System Control software, or by Solaris command, to locate a system.
	Fault	This amber LED lights to indicate that the system hardware or software has detected a system fault.
	Power / OK	This green LED lights when the main power (48 VDC) is on.

Fan Tray LEDs

Icon	Name	LED Function
	Fan Tray 0 (FT 0)	This amber LED lights whenever a fault is detected in the CPU fans.
	Fan Tray 1 (FT 1)	This amber LED lights whenever a fault is detected in the PCI fans.

Hard Disk Drive LEDs

Icon	Name	LED Function
	OK-to-Remove	This blue LED lights when it is safe to remove the hard disk drive from the system
	Fault	This amber LED lights whenever the system software detects a fault in the monitored hard disk drive. Note that the system Fault LED on the front panel will also be lit when this occurs.
	Activity	This green LED lights whenever a disk is present in the monitored drive slot. This LED blinks slowly to indicate that the drive is spinning up or down, and quickly to indicate disk activity.

Power Supply LEDs

Icon	Name	LED Function
	OK-to-Remove	This blue LED lights when it is safe to remove the power supply from the system.
	Fault	This amber LED lights whenever the power supply s internal microcontroller detects a fault in the monitored power supply. Note that the Fault LED on the front panel will also be lit when this occurs.
	DC Present	This green LED lights when the power supply is on and outputting regulated power within specified limits.
	AC Present	This green LED lights whenever a proper AC voltage source is input to the power supply.

Rear Panel LEDs

Refer to the Sun Fire V490 Rear View for rear panel LED locations.

System LEDs are also found at the upper-left corner of the back panel. Also located on the back panel are LEDs for the system's two power supplies and RJ-45 Ethernet ports.

System LEDs

Icon	Name	LED Function
	Locator	This white LED is lit by Sun Management Center or Sun Remote System Control software, or by Solaris command, to locate a system.
	Fault	This amber LED lights to indicate that the system hardware or software has detected a system fault.
	Power / OK	This green LED lights when the main power (48 VDC) is on.

Ethernet LEDs

Power Supply LEDs

Icon	Name	LED Function
	OK-to-Remove	This blue LED lights when it is safe to remove the power supply from the system.
	Fault	This amber LED lights whenever the power supply s internal microcontroller detects a fault in the monitored power supply. Note that the Fault LED on the front panel will also be lit when this occurs.
	DC Present	This green LED lights when the power supply is on and outputting regulated power within specified limits.
	AC Present	This green LED lights whenever a proper AC voltage source is input to the power supply.