Technical data

Controls, Indicators, and Connectors
2-4
Understanding the LEDs
There are ten LEDs located on the front of the system unit. The Series 400 work-
station has 8 amber LEDs and 2 green LEDs. The green power LED of the Model
400t, 425t, and 400dl is not located with the remaining 9 LEDs. It is located near the
power switch. The green power switch of the Models 400s and 433s is the top LED
in the pattern of 10 LEDs. It is lighted when the system is powered on.
HP-UX only uses the power LED. The remaining LEDs are used by Domain/OS for
troubleshooting and indicating various operating system and network activities.
Figure 2-2 shows the workstations’ LEDs.