Cisco Catalyst 4000 series Hardware Troubleshoot page 12

Note: The Catalyst 4006 requires two power supplies installed to operate the switch and the
third is for redundancy. Refer to Module Overview for more information.
b. Inspect the power supplies. Make sure there is power applied to both units. If a redundant
power supply is installed but has no power, the show system command output shows that the
power supply status and sys−status is faulty.
c. Reseat the power supply. Try a different circuit or swap power cords. If the status is still red,
or the show system command output shows faulty, this is a power supply failure. Refer to
Removal and Replacement Procedures for more information.
Fan assemblyWhenever system power is on, the system fan assembly should operate. You
should be able to hear the fan assembly to determine if it operates.
a. Inspect the fan assembly and power supplies to verify if power is being applied to the system.
b. Issue the show system command to determine if the fan−status is faulty.
c. Reseat the fan assembly and tighten the captive installation screws. If necessary, reset the
switch. If the show system command output still shows faulty, this is a fan failure. Refer
to Removal and Replacement Procedures for more information.
Supervisor engineThe supervisor engine contains the system operating software. Check the
supervisor engine if you have trouble with the system software. The status LED on the
supervisor engine indicates whether the supervisor engine has passed all diagnostic tests.
Have a console session open and determine whether the supervisor is in boot or rommon
mode. If this is the case, see the Supervisor is not online or stuck in rommon section for
troubleshooting steps.
a. Issue the show system command in order to determine if the sys−status is faulty. Issue the
show test 0 command in order to determine if the supervisor has passed all diagnostic tests as
of the last bootup of the switch. Note any F for fail results.
b. Inspect the fan assembly and power supplies for any problems.
c. Have a console session open and capture bootup POST diagnostics and system error
messages. Reset the switch and issue the show test 0 command in order to determine if the
diagnostic test on bootup has been passed.
d. Remove the supervisor and inspect for bent pins. Reseat the supervisor, firmly press down the
ejector levers, and tighten the captive installation screws. Wait for the supervisor to initialize.
If the show system command sys−status is still faulty, the supervisor has failed.
Switching modulesThe status LEDs on each switching module indicate whether the
switching module has been initialized correctly. The supervisor engine must be operating
properly before the switching module initializes. If a switching module is improperly installed
in the switch, it does not function.
a. If a link (port) LED is solid orange or is blinking orange after the supervisor bootup and
module initialization, see the Can not connect to a remote host, router, or another switch
section.
b. Capture the show version and show module command output. Determine if the software
version you are running supports this module. Refer to the Module Overview section of
Catalyst 4500 E−Series Module Installation Note for more information.
c. Determine if the status is disable. This indicates that the module was administratively
disabled. The status LED is orange in this case. Issue the set module enable <mod>
command.
d. View the output of the show module command in order to determine if status is faulty for
that module. View the output of the show test 0 command in order to determine if this
module passed all its diagnostic tests as of the last bootup of the switch. Note any F for fail
results.
e. Have a console session open and capture bootup POST diagnostics and any system error
messages. Issue the reset <mod> command in order to reset the module. Issue the show test
0 command in order to determine if this module has passed all of its diagnostic tests on