I have a cisco 4506 with supervisor Engine IV.Initially when i put the switch on the supervisor engine light turns orange.after some diagnosis i found out that one of the fans on the power supply wasnt functioning properly.when i remove this power supply and power the switch the sup engine turns green.However the ethernet interfaces and gigabit ethernet interfaces on the line card r down no traffic is being processed on the switch.what could be the problem.Is there a way u should configure the 4506 to process packets