System information

Troubleshooting Hardware
Book Title
3-24
Table 3-2 Hardware: Cisco 7000 Series Startup Problems and Solutions
Possible Problem Area Solution
Power subsystem
Step 1 Check to see whether the DC OK LED is on.
Step 2 If the LED is not on but the fans are operating and LEDs on the
processor modules are on, the Power Supply LED might be faulty.
Step 3 If the LED is not on and there is no other activity, make sure the power
switch is fully in the on position.
Step 4 Make sure the power source, power cable, and power supply are
functioning correctly. Swap parts to see whether one of the components
is faulty.
Step 5 Ensure that the fan tray is seated properly. Make sure the fan control
board edge connector is inserted fully in the backplane socket.
Cooling subsystem Step 1 Check to see whether the fans are operating.
Step 2 If the fans are not operating and the DC OK LED is off, there might be a
problem with the +24V DC power.
Step 3 Ensure that the fan tray is seated properly. Make sure that the fan
control board edge connector is inserted fully in the backplane socket.
Step 4 If the system and the fans start up but shut down after about two
minutes, one or more fans has failed or is operating out of tolerance.
You will see an error message similar to the following:
%ENVM-2-FAN: Fan array has failed, shutdown in 2
minutes
If one or more fans or the fan control board fails, you must replace the
fan tray.
Step 5 If you see the following error message, the system has detected an
overtemperature condition or out-of-tolerance power inside the chassis:
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor initiated
shutdown
If an environmental shutdown results from an out-of-tolerance power
condition, the DC OK LED will go off before the system shuts down.
This shutdown message could also indicate a faulty component or
temperature sensor. Use the show environment or show environment
table command to display the internal chassis environment.
Step 6 Make sure that heated exhaust air from other equipment is not entering
the inlet vents, and that there is sufficient clearance around the chassis
to allow cooling air to flow.