Table of Contents
Advertisement
Power-on Self-tests (POST)
B
At this time you can attach an ASCII
terminal to observe POST messages.
See Section 3.5, "Connecting a Terminal
to the System Master" for TTY set-up.
Observe the LED patterns until the self-tests are complete.
After POST ends, 8 yellow LEDs on the system master
should continue cycling. Yellow LEDs on other system
boards should stay on, until OBP ends and the operating
system begins running. If you have a terminal, a message
will be displayed.
The DC voltages check out. Attempt to power cycle the system
and observe the LED patterns.
The self-test cycle should take one minute to complete if the key switch is in the
On (1) position (or the Secure position). Observe the system board LEDs.
Cycling
Figure 3-4
Branch B: Power-on Self-test (POST) Functions
Troubleshooting Flow Diagrams
No
Is there LED
activity?
Yes
Pattern
Are the LEDs
cycling or
frozen?
A set of 8 yellow LEDs turned off indicates a
problem board.
Did self-tests
pass?
Contact Customer Support for
further assistance.
No
B.1
Yes
C
3
3-5
Advertisement
Chapters
Table of Contents
Troubleshooting
