3.5 inch drive bays
5.25 inch drive bays
3.5 inch SATA drive bays
3.5 inch SATA hard drives
5.25 inch SATA DVD-ROM,
DVD+/-RW, or Blu-ray Disc™
Control Lights and Diagnostic Lights
Drive access light
Link integrity light
off — system is either turned off or is not receiving power.
blue — system is fully functional and in the On state.
Blinking blue indicates sleep state of the computer.
amber — solid amber light when the computer does not start
indicates a problem with the system board or power supply.
Blinking amber light indicates a problem with one of the
devices in the system.
displays the SATA hard drive or CD/DVD activity.
blue light — blinking blue light indicates that the computer
is reading data from or writing data to the drive(s).
off — system is off or is not detecting a physical connection
to the network.
green — A 10 or 100 mbps connection exists between the
network and the computer.
orange — A 1000 mbps connection exists between the network
and the computer.