DEC 3000 800, Owner'S Manual

Page: 227 / 318

Recording the Diagnostic Display Light Pattern
Understanding
the Diagnostic
Lights During system startup, the diagnostic display lights flash an
array of different numbers and letters as the system startup
tests are performed. The numbers on the display are not
random. They represent the hexadecimal number of a test action
or result.
For instance, when the startup tests are completed successfully
and your system is in console mode, the diagnostic display lights
display the hexadecimal code DD, as shown in Figure 14–6.
Figure 14–6 Diagnostic Display Lights
MLO-010467
When your system is in program mode, the diagnostic display
lights display the hexadecimal code 00 or 90.
When to
Record the
Diagnostic
Display Lights If a problem is detected during system startup or when you run
diagnostic tests, you should record the diagnostic display light
pattern on the appropriate section of the Handling Problems
Worksheet at the end of this chapter.
Be sure to note when the display occurred, for instance, during
startup or after entering the
show config
command.
Running Diagnostic Tests 14–11