POST Indicators
If you are using an ASCII terminal (attached to serial port 1), a series of POST
indicators appear on the screen as each subsystem is initialized.
If you are using a directly-attached keyboard and a graphical display attached to
a display adapter, then the POST progress indicators appear as icons across the
bottom of the display as follows.
If the POST process stops and indicates an error on the LED or console in any one
of these subsystems, record the error number and refer to Chapter 8, “Hardware
Problem Determination” on page 8-1.
Memory Modules: Tests system memory.
Keyboard: Initializes the keyboard and mouse. When this icon
appears, you can choose one of several different startup options.
Pressing the F1 key activates the System Management Services.
Pressing the F5 or F6 key chooses a service-mode boot from the
default or custom boot list.
Pressing the F8 key selects the Open Firmware Command line.
If any of these keys are pressed, the chosen option occurs after all of
the following POST icons appear. If no keys are pressed, the system
unit boots from the default boot list and starts the operating system after
all POST icons appear.
Network: Initializes network adapters.
SCSI: Initializes SCSI Adapters.
Audio: Initializes the audio system. Any startup option keys must be
pressed before the end of audio initialization in order to take effect.
Chapter 2. Using the System Unit
2-3
