Front I/O ConnectorsBack View10 power button Press to turn on the computer.NOTE: The power button can also be used to wake the system or toplace it into a power-saving state (see Power Management).NOTICE: To avoid losing data, do not use the power button toturn off the computer. Instead, perform an operating systemshutdown.11 power light The power light illuminates and blinks or remains solid to indicatedifferent states:¡ No light — The computer is turned off.¡ Steady green — The computer is in a normal operatingstate.¡ Blinking green — The computer is in a power-saving state.¡ Steady amber — There may be a problem with aninstalled device (see Solving Problems).¡ Blinking amber — An internal power problem may exist(see Power Problems).12 computer stand Attach the computer stand to provide stability to the system.CAUTION: The computer stand should be installed at all timesto ensure maximum system stability. Failure to install thestand could result in the computer tipping over, potentiallyresulting in bodily injury or damage to the computer.1 microphoneconnectorUse the microphone connector to attach a personal computer microphonefor voice or musical input into a sound or telephony program.2 headphoneconnectorUse the headphone connector to attach headphones.3 diagnosticlights (4)Use the sequence of these diagnostics lights to help troubleshoot aproblem with your computer (see Diagnostic Lights).4 hard-driveactivity lightThe hard drive light is on when the computer reads data from or writesdata to the hard drive. The light may also be on when a device such asyour CD player is operating.5 network linklightThe network link light is on when a good connection exists between anetwork and the computer.6 USB 2.0connectors (2)Use the front USB connectors for devices that you connect occasionally,such as flash memory keys, cameras, or bootable USB devices. For moreinformation on bootable USB devices see Boot Sequence.It is recommended that you use the back USB connectors for devices thattypically remain connected, such as printers and keyboards.7 IEEE 1394connectorUse the IEEE 1394 connector for high-speed data devices such as digitalvideo cameras and external storage devices.