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Chapter 9
Troubleshooting Overview
9-3
9.2
Hardware Indicator LEDs
LEDs indicate system status. The front panel and the boards have three LEDs
(
). Power supply modules have two LEDs.
FIGURE 9-2
LED Symbols
The LEDs on the system front panel or the clock+ board indicate the status of the
system as a whole. The LEDs on individual boards and power supplies indicate the
status of the individual board or power supply. Many of the LED codes (
)
are common to the system front panel and various types of boards.
lists
specific exceptions for LED codes for system boards.
System (3 LEDs):
Board (3 LEDs):
Power
Cycling or
Hardware
running
normally
failure
PCM (2 LEDs):
Summary of Contents for 5500
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