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.

    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.

    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. the computer can also be turned on in any of the following ways:

    1 if a power failure occurs while the computer is turned on, the computer will restart automatically when power is restored.

    2 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.

    what you see and hear when you start the computer depends on the features that are installed and the settings in the configuration/setup utility program.

    if the power-on self-test (post) detects a problem, there might be a series of beeps or no beep, and a numeric error message might appear on the screen. write

    down any beep series and error code numbers with descriptions, and then see “troubleshooting charts” on page 86 for an explanation of the error codes.

    on a computer running a windows operating system, the following messages might be displayed briefly during startup:

    1 to start the product recovery program, press f11

    2 press f1 for configuration/setup utility, press f12 for boot menu

    3 press ctrl+a for scsiselect utility (some models)

    on a computer running the red hat linux operating system, the following messages might be displayed briefly during startup:

    1 press f1 for configuration/setup utility

    2 press ctrl+a for scsiselect utility (some models)

    to start the product recovery program in red hat linux, watch the screen until the operating system selection menu is displayed and select ibm preload recovery & diagnostics.

    to use these features, press the applicable function key or keys quickly. the messages appear for only a short time. for more information about these messages, see “using the configuration/setup utility program” on page 21 and “using the scsiselect utility program (some models)” on page 30.

    use the configuration/setup utility program to configure passwords, pci adapters, and other options.

    the operating system and application programs start from the hard disk. if your computer is attached to a network, the computer will begin attaching to any lans and remote applications to which you have access. a network administrator can also start your computer remotely to download programs or gather information about computer performance. for more information, see “wake on lan” on page 18.