Cisco 7603 - Modular Expansion Base Installation Manual page 102

Troubleshooting Router Booting Issues
Possible Problem Area
Power subsystem
Cooling subsystem
Cisco 7600 Series Routers Module Guide
4-2
Solution
1. Check whether or not the blower is operating and that
the LEDs on the processor modules are on. If the
blower and LEDs are on, but the Power Supply LED is
off, the Power Supply LED is probably faulty.
Ensure that the power switch is set correctly to the on
2.
position.
Ensure that the power source, power cable, and power
3.
supply are functioning correctly. Swap parts to see
whether any of the components are faulty.
Ensure that the blower module is seated properly. Make
4.
sure that the blower control board edge connector is
inserted fully in the backplane socket.
1. Check whether or not the blower is operating when you
start up the system. If the blower is not operating, there
might be a problem with the blower or the +24 V DC
power:
If the Output Fail LED is on, there might be a
–
problem with the +24V DC supply to the blower or
fan tray at either the power supply or the blower
control board.
– If the blower is not operating and the Output Fail
LED is off, ensure that the blower module is seated
properly. Ensure that the blower control board
edge connector is inserted completely in the
backplane sockets.
If the system and blower starts up, but shuts down after
2.
two minutes, one or more fans might have failed or
might be operating out of tolerance and this error
message is displayed.
%ENVM-2-FAN: Fan has failed, shutdown in 2 minutes
If the blower or the blower control board fails, you must
replace the blower module.
Chapter 4 Troubleshooting
OL-5077-7