Sun Microsystems 816-7727-10 manual Following table describes the power supply LEDs

From left to right, system status LEDs operate as described in the following table.

TABLE A-1System Status LEDs

Name	Description
Locator	This white LED is lit by Sun Management Center or ALOM
	software, or by Solaris command, to locate a system.
Service Required	This amber LED lights to indicate that the system hardware
	or software has detected a system fault.
System Activity	This green LED lights when the AC power is available and
	the operating system is running.

The following table describes the power supply LEDs.

TABLE A-2Power Supply LEDs

Name	Description
OK-to-Remove	This blue LED lights when it is safe to remove the power
	supply from the system.
Service Required	This amber LED lights when the power supply’s internal
	circuitry detects a fault in the monitored power supply. Note
	that the Service Required LEDs on the front and back panels
	also light when this occurs.
Power OK	This green LED lights when the power supply is on and
	outputting regulated power within specified limits.
Standby Available	This green LED lights when a proper AC voltage source is
	input to the power supply.

The following table describes the disk drive LEDs.

TABLE A-3Hard Disk Drive LEDs

Name	Description
OK-to-Remove	This blue LED lights when it is safe to remove the hard disk
	drive from the system.
Service Required	Reserved for future use.
Activity	This green LED lights when 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.

50 Sun Fire V440 Server Installation Guide • July 2003