Cisco 3000 Series

Problem
Solving
TrouWeshooting
the Power
and
Cookig Systems
Check the
following
items
to
help
isolate the
problem
With the
power
switch
on
does
the blower
operate
If
yes
the
AC
input
checks
out
If
no
suspect
the AC
input
AC
source
the
routers circuit
breaker
or the
power supply
cable
With
the
power
switch
on
and
system
LEDs
lit
does the fan
operate
If
no
suspect
the fan
Does the
system
shut down
after
being
on short time
Suspect an
environmentally
induced
shutdown
Check the
environmental site
requirements
in the section
General Site
Requirements
in
Chapter
and
ensure that the chassis
intake and
exhaust vents
are
clear
Suspect
power supply
failure
System
partially boots
but LEDs do
not
light
Suspect
5-volt
power supply
failure
Troubeshootkig
the Network
Onterfaces
and Cabes
Check
for the
following
symptoms
to
help
isolate the
problem
Network interface is
not
recognized by
the
system
Check the LED
that
corresponds
to the network
interface
Network interface is
recognized but interface
ports
will not
initialize
Check the
external cable
connection
System
will
not boot
properly
or
constantly/intermittently
reboots
Suspect
the
processor
or software
System boots
but
console
screen is frozen
Check the
external console
connection
Verify
the
console baud
rate in the
terminals
documentation
System
powers
on and boots
with
particular
interface
disconnected
Suspect
the
network
interface
System
powers
on and boots
with
particular
network
interface or cable
disconnected
Suspect
the network
interface
or
cable
4-2 Cisco
3000 Hardware Installation and
Maintenance