Preliminary Power-Up Test Displays - Digital Equipment 300 Series AXP Reference Manual

Preliminary Power-up Test Displays

Preliminary Power-up Test Displays
Power-up When you turn on the system, the SROM (serial ROM) code
Problems performs the following preliminary diagnostic tests:
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•
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If no fatal errors are encountered, the SROM code loads the
main console firmware from the flash ROM into main memory.
If the system stops executing because of a fatal error before it
reaches main console mode, messages will not be displayed on
your screen. However, you may be able to determine the problem
by examining the diagnostic display lights (light-emitting diodes,
referred to as LEDs, and described in the next section).
Location of Diagnostic display lights are the eight red lights located inside
Diagnostic the system unit.
Display Lights
Figure 8–1 shows the location of these LEDs in the system. You
should be able to read them through the air vents on the side of
the system unit cover without removing the cover. If you have
trouble seeing the lights, however, remove the system unit cover,
as described in Chapter 2.
8–2
Memory sizing
I/O
Cache