cd-rom drive activity led
when this led is lit, it indicates that the cd-rom drive is in use.
cd-eject button
press this button to insert a cd into or remove a cd from the cd-rom drive.
hard disk drive activity led
when this led is lit, it indicates that the hard disk drive is in use.
power-on led
when this led is lit and not flashing, it indicates that the computer is turned on. when this led is flashing, it indicates that the computer is off and still connected to an ac power source.
power-control button
press this button to turn the computer on or off.
ethernet transmit/receive activity led
when this led is lit, it indicates that there is activity between the computer and the network. there are two of these leds, one on the front and one on the rear of the computer.
ethernet link status led
when this led is lit, it indicates that there is an active connection on the ethernet port. this led is located on the rear of the computer.
system-error led
when this led is lit, it indicates that a system error has occurred. an led on the system board is also lit to help isolate the error.
ieee 1394a (firewire) connectors
use these connectors (four-pin on the front and six-pin on the rear) to connect firewire devices, such as digital video cameras and external hard disk drives.
mic connector (pink)
use this connector to connect a microphone to your computer when you want to record voices or other sounds on the hard disk. you can also use this connector (and a microphone) with speech-recognition software.
line out connector (green)
use this connector to send audio signals from the computer to external devices, such as speakers with built-in amplifiers, headphones, multimedia keyboards, or the audio line-in jack on a stereo system.
usb connectors
use these connectors to connect usb devices to your computer, using redundant plug and play technology.