Installation Manual

Interpreting LED Error Patterns
When power to the router is cycled or the Reset button is pushed, LED
error patterns have the meanings shown in table 3-1 below.
Table 3-1. LED Error Patterns During Initialization
Initialization Fault LED Patterns Diagnostic Tips
Power Self-test Fault Net Fail
Unlit
111
Check power cord and power source. If they are OK, replace
the router.
Lit Lit Lit All
Unlit
Router hardware failure detected during self-test. Replace
router.
Lit Lit Lit All Lit
or
Flashing
While Reset button pressed or when power is first applied,
this pattern is normal. If Reset is
not pressed, router
hardware failure detected during self-test. Replace router.
Lit Lit Lit Some, but
not all, Lit
Ports whose Net Fail LEDs are Lit are faulty. Replace router.
Ports whose Net Fail LEDs are unlit
may be usable.
Lit Flashing Flashing Flashing You have pressed the Reset and Clear buttons for too long to
clear the configuration. Release them. Press them again
briefly if clearing configuration is desired.
Lit
or
Flashing
Lit
or
Flashing
Unlit Unlit
After (1) Reset and Clear buttons are held down, then (2)
Reset button is released, this pattern is normal.
1
This LED is not important for the diagnosis.
After the self-test has passed successfully, LED error patterns have the
meanings shown in table 3-2 on the next page.
Troubleshooting
Interpreting LED Error Patterns
3-4