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Table 7-10. SDN Card LED Sequence During Software Rebooting
Test Stage
SDN Driver Installation
Normal Operation
SDN Problem
This lighting sequence happens very rapidly (1-2 s), so it may not be possible to identify
each stage. However, by carefully observing the SDN Card LEDs during software start up
or the SDN Diagnostic test and comparing the lighting sequence to the above tables, it may
be possible to identify errors in SDN operation. For example;
•
•
•
•
•
LED Condition
The SDN driver starts near the end of the OS boot process. When it
starts, it sets all 3 LEDs on, flashes the 2 outside LEDs off and then on,
and then extinguishes all 3 LEDs one by one. Normal operation then
begins.
The LED furthest from the card end flashes at a one second rate
indicating that communication with the computer is occurring.
If the LED nearest the card end comes on during normal operation, an
SDN problem has occurred. Generally, this means that the Card is not
connected properly to a functioning SDN.
if the SDN Card Test does not pass, the problem is with the SDN Card. Replace the
card and rerun the test
if the Code-to-card stage did not occur, then the firmware code on the SDN Card was
not reprogrammed. For a Philips system that has been operating normally, this stage
should not occur,
if the SDN Driver Installation stage does not occur, then the SDN driver did not
establish contact with the SDN Card,
if the Normal Operation stage pattern did not occur, then normal operation has not
been established,
if the SDN Problem pattern occurs during normal operation, then there is an SDN
connection problem. Check the SDN interconnections and reboot the Philips system.
Description
Maintenance, Troubleshooting, and Repair
Troubleshooting
7-109
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Table of Contents
Troubleshooting
