Troubleshooting Power Failures; Understanding Status Leds To Troubleshoot; Led Activity During Booting; Led Identification - Juniper E Series Hardware Manual

E-series Hardware Guide

Troubleshooting Power Failures

Table 11: Causes of power failures
Symptom
System does not
power up.
System shuts down.

Understanding Status LEDs to Troubleshoot

LED Activity During Booting

LED Identification

100 !

Troubleshooting Power Failures

The system's distributed power system is designed to consume low levels of power
and dissipate low levels of heat. See Chapter 11, System Specifications for
specifications of power consumption and heat dissipation. If you suspect a power
problem, refer to Table 11.
Possible Problems
!
System is not receiving power.
!
A module's power supply has
malfunctioned.
!
Power source cannot handle system
load.
!
Temperature too high
!
Loss of power
Module LEDs can show you the immediate status of a module and alert you to a
problem with the module or one of its ports. It is helpful to familiarize yourself with
LED activity so that you can easily detect and correct a module-related problem
with minimal or no system downtime.
When the system boots, it runs a series of tests for each module installed in the
system, and the LEDs display various configurations. Refer to the tables in this
section to understand normal and abnormal LED activity. For troubleshooting
information, see Table 14.
The system's modules have two sets of status LEDs. The top set indicates generic
router and module status. The bottom set indicates module-specific status, such as
port status (line modules) or fan status (SRP module).
The number against the port status LED on a line module corresponds to the
number of the port on the I/O module. Some line modules have more port status
LEDs than the number of ports on the I/O module. In these cases, only the LEDs for
the corresponding ports on the I/O modules are active.
Actions
The following actions apply to all of the possible
NOTE:
problems.
1. Verify that all power connections are correct.
2. Verify that the power supply is delivering the correct
voltage, current, and wattage to the system. See to
Chapter 11, System Specifications.
3. If the system still does not operate, contact Juniper
Networks Customer Service.
NOTE: The following actions apply to all of the possible
problems.
1. Verify that power connections are properly attached.
2. Verify that system is receiving power.
3. Check whether or not the LEDs are lit.
4. Run diagnostics on SRP and line modules.
5. If system will not reset, contact Juniper Networks
Customer Service.