Juniper M10i Hardware Manual page 110

M10i Internet Router Hardware Guide
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Troubleshooting the Power System
Check the red alarm LED on the craft interface:
If it is lit, issue the following CLI command for information about the cause
of an alarm condition:
user@host> show chassis alarms
For a list of messages that can appear in the output, see
Interface Alarm Messages"
A common cause of power supply shutdown is that the temperature of the
power supply or another router component has exceed the maximum limit.
If the red alarm LED is not lit, check that the power switch is in the
position on the power supply faceplate.
Replace the faulty power supply with a spare. For instructions, see
on page 107 and
an AC Power Supply"
If the LED lights correctly on the spare, the original power supply is faulty. Return
it to Juniper Networks for replacement, as described in
Support and Returning Hardware"
If the spare power supply also does not work, connect the router to a different
power source. You might also try replacing the power cord (on an AC-powered
router) or power cable (on a DC-powered router). For instructions, see
"Disconnecting and Connecting AC Power"
Connecting DC Power" on page 116 (you do not need to disconnect and reconnect
the grounding cable on a DC-powered router).
If you cannot determine the cause of the problem or need additional assistance,
see "Juniper Networks Technical Assistance Center"
on page 80.
"Replacing a DC Power Supply"
on page 189.
on page 110 and
on page 83.
"Hardware and
ON
"Replacing
on page 112.
"Contacting Customer
"Disconnecting and