System Power-Up Test
Overview
The system power-up self-test sequentially tests the devices in the
system. This test takes about one minute to complete for a 16-MB
base system. When the test successfully completes, the console
prompt appears. Figure 5–1 shows the prompt.
Factors increasing the test time are:
Additional memory
Maximum memory configurations take approximately seven
minutes to complete the self-test,
Additional time is required for SCSI devices.
The time for the system power-up self-test to execute can be
reduced by setting the FBOOT parameter to 1. The system then
does not test memory on power-up.
Power-Up
Sequence
Figure 5–1 and Figure 5–2 show the console screens that display
when successful and unsuccessful power-up tests occur.
The following events summarize the power-up sequence:
If the system finds a fatal error before initializing the console,
the error can only be decoded using the eight error LEDs
located on the lights and switches board.
Refer to Appendix A. If all of the error LEDs remain on, the
ROM code did not start.
If the graphics subsystem fails self-test, the system assumes
that a console terminal is connected to the console/printer
port.
If the alternate console switch, located on the light and
switches board, is set to alternate console (switch in the
up position), the system assumes that a console terminal is
connected to the console/printer port.
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