Diagnostic Led Definitions - Digital Equipment VAXstation 3100 Maintenance Manual

G
Diagnostic LED Definitions
This appendix defines the eight LEDs on the back of the system box during
each phase of the testing and power-up initialization. The LEDs are divided
into two fields. The first four LEDs indicate the cWTent state of the system
and the second set of four depend on the previous four.
There are 16 possible combinations for each set of LEDs. The 4 LEDs that
indicate the state of the system have the follow· g definitions. T e other
four LEDs have another meaning as indicated in Table G- 1. The number 1
indicates the LED is lit.
Table G-1 Diagnostic LEDs Definitions
State Substate Deftnltlons Recommendations
1 1 1 1
1111
Pcv.'er is a_pplied but no instruction is
See Section G.i
.1..1..LJ.
............
executed.
1111
0000
Power is applied. The ROM code See Section G.1
is successfully started and several
instructions have been executed.
1110
0000
Console memory sizing routine is See Section G.1
entered. Memory to hold the console
data structures is iocated. Tne substale
variables have no meaning in this
section of the test.
1101
0000
The console data structures are See Section G.1
initialized and have started testing
the NVR.
1100 0000
The NVR test completed and the DZ
See Section G.1
test has started.
1011 0000
The DZ
test completes. An optional See Section G.1
video has been found but its testing
has not been started. This is part of
the console determination code.
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