2.3. Power on sequence, LEDs, and audio signals

Several MCA based RS/6000 systems have LED displays to show what phase of the boot process the system is going through. If something goes wrong, you can interpret the LED codes and take the appropriate action to rectify the problem.

Tip

As a specialist, memorizing the error codes enables you to quickly get to the heart of critical system problems. Therefore, it is one of the sections of the exam that requires memorization.

PCI RS/6000 systems use sounds and graphics to show the different phases of the boot process. For example, as soon as you power on the system, an audio beep is produced when the processor is found to be active, the PowerPC logo is shown (or text is presented) when the system ...

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