Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - E120 AND E320 HARDWARE GUIDE REV 9-29-2010 Hardware Manual page 98

E120 and E320 11.3.x Hardware Guide
Table 12: Troubleshooting Abnormal LED Activity on Modules
Diagnostic Signs Possible Problems
POWER A (PA) LED
is not lit
POWER B (PB) LED
is not lit
FAIL LED lights
82
NOTE: When you reboot the system after installing a new version of the
software, the line modules appear to boot twice.
Table 11: Normal Activity of Functional Status LEDs During Booting
OK FAIL ONLINE
off off off
off on off
on off off
on off on
If the system detects an error during booting, the FAIL LED lights. Some failure conditions
can cause the module not to boot. In this case, the LEDs might all be off. The system
then resets the module.
If the operational software detects an error, the FAIL LED lights. Some errors can cause
a module reset. Crash information is displayed at the console on the next reboot.
System is not receiving power
from Power A.
System is not receiving power
from Power B.
The line module and IOA are
incompatible.
A hardware failure, such as a
failed module.
Status Process
1. Module is in the power-up restart state; the FAIL LED
stays on briefly.
2. Module is initializing, and diagnostic tests are
running; the FAIL LED stays on briefly.
3. Module passed the diagnostics; the system boots.
4. Module is now up and running.
Actions
1. Make sure Power A and Power B terminal connections are
securely attached.
2. Verify that power switches are on.
3. Make sure connections to power sources are securely
attached.
4. If system still does not operate, contact the Juniper Networks
Technical Assistance Center.
1. Make sure that the line modules and IOAs are compatible;
replace if necessary.
2. If you replaced the IOA only, issue the reload slot slot_number
command.
3. If you replaced the line module or if there was a hardware
failure, the system is supposed to automatically reset the
module.
4. If the condition persists, contact the Juniper Networks
Technical Assistance Center.
Copyright © 2010, Juniper Networks, Inc.