IBM IntelliStation A Pro 6224, Руководство по техническому обслуживанию и ремонту, Страница: 15 / 172

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 the 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 the computer, using
redundant Plug and Play technology.
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.
Computer power features
When the computer is connected to an ac power source but is not turned on, the
operating system does not run, and all core logic is shut down; however, the
computer can respond to remote requests to turn on the computer. The power-on
LED flashes to indicate that the computer is connected to an ac power source but is
not turned on.
Turning on the computer
Approximately 20 seconds after the computer is connected to ac power, the
power-control button becomes active, and you can turn on the computer and start
the operating system by pressing the power-control button.
Notes:
1. Turn on all external devices, such as the monitor, before turning on the
computer.
2. The power-on LED on the front of the computer is lit when the computer is on
and while it is being turned on.
The computer can also be turned on in either of the following ways:
v
If a power failure occurs while the computer is turned on, the computer will
restart automatically when power is restored.
v When you connect the computer to power for the first time, the Wake on LAN
®
feature can turn on the computer. If the computer was previously turned on, it
must be turned off correctly for the Wake on LAN feature to turn on the
computer.
Turning off the computer
When you turn off the computer and leave it connected to ac power, the computer
can respond to requests, such as a remote request to turn on the computer. To
remove all power from the computer, you must disconnect it from the power source.
Chapter 1. Introduction
5