Troubleshooting The Power System - Juniper MX240 Hardware Manual

MX240 Ethernet Services Router Hardware Guide
If a DPC is not functioning normally, follow these guidelines to troubleshoot the DPC:

Troubleshooting the Power System

To verify that a power supply is functioning normally, perform the following steps:
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Troubleshooting the Power System
Total RLDRAM
Total DDR DRAM
Start time:
Uptime:
Slot 2 information:
State
Temperature
Total CPU DRAM
Total RLDRAM
Total DDR DRAM
Start time:
Uptime:
For further description of the output from the commands, see the JUNOS System
Basics and Services Command Reference.
Make sure the DPC is properly seated in the midplane. Check that each ejector
handle has been turned clockwise and is tight.
Check the LEDs on each power supply faceplate.
If an AC power supply is correctly installed and functioning normally, the
AC OK and DC OK LEDs light steadily, and the
information about the LEDs, see "AC Power Supply LEDs" on page 22.
If a DC power supply is correctly installed and functioning normally, the
, , and
PWR OK BRKR ON
information about the LEDs, see "DC Power Supply LEDs" on page 24.
Issue the CLI show chassis environment pem
installed power supplies. As shown in the sample output, the value
rows labeled State indicates that the power supplies in slots
functioning normally:
user@host> show chassis environment pem
PEM 0 status:
State
Temperature
DC output
PEM 2 status:
State
256 MB
4096 MB
2007-12-06 11:33:01 PST
4 hours, 34 minutes, 48 seconds
Online
33 degrees C / 91 degrees F
1024 MB
256 MB
4096 MB
2007-12-06 11:33:05 PST
4 hours, 34 minutes, 44 seconds
PS FAIL
LEDs light green steadily. For more
INPUT OK
command to check the status of
Online
OK
OK
Online
LED is not lit. For more
in the
Online
0 and 1 are