Indicates the power state of the unit.

• No light—no power to the unit
• Red—S5, suspend supplies are on and working
• Blue—S3, standby supplies are on and working
• Green—S0, all supplies are on and working

Indicates the state of the boot process.

• No light—no power to the unit or BIOS has not started
• Solid Red—BIOS has started running
• Flashing Red—BIOS POST error or boot has halted
• Solid Green—BIOS is loading OS
• Flashing Green—OS is loaded and NCR drivers are running

Indicates activity of the hard drive or SSD.

• No light—no activity
• Solid Green—HDD or SSD is processing data

• No light—no network connection
• Solid Green—connected to a network

Indicates link activity and has the same indication with the LAN port LED.

• No light—no link activity
• Solid Green—10/100Mbit Ethernet link up
• Solid Orange—1000Mbit Ethernet link up
• Flashing Orange—Ethernet transmission is active