Troubleshooting The Power Subsystem - Cisco 7000 Hardware Installation And Maintenance

Troubleshooting Overview

Troubleshooting the Power Subsystem

Check the following to help isolate the problem:
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If you are unable to resolve the problem, or if you determine that either a power supply or chassis
connector is faulty, contact a service representative for instructions.
4-154 Cisco 7000 Installation and Maintenance
On the lower power supply, is the AC power or input power LED on?
— If yes, the power source is good, and the power supply is functional.
— If no, first suspect the power/interlock switch. Loosen the captive installation screw, turn the
power switch fully counterclockwise to the off (O) position, pull the supply out of the bay a
few inches, then push it firmly back into the bay, and ensure that the front of the power supply
is flush with the back of the chassis.
Tighten the captive installation screw, then turn the power switch clockwise until it is
completely turned to the on (|) position, and the interlock tab is fully extended into the
interlock slot in the chassis. (Refer to the section "Installing Power Supplies" in the chapter
"Installing the Router.")
— If the AC power (or input power) and DC fail (or out fail) LEDs both remain off, and the
switch is correctly set, suspect the power source or the power cable. Turn the switch off,
connect the power cable to another power source if available, and turn the switch back on. If
the LED then comes on, the problem is the first power source.
— If the LED fails to come on after you connect the power supply to a new power source,
replace the power cord, and turn the switch back on. If the AC power (or input power) LED
then comes on, return the first power cable for replacement.
— If the LED still fails to come on when connected to a different power source with a new
power cable, the power supply is probably faulty. If a second power supply is available,
install it in the lower power supply bay and contact a service representative for further
instructions.
On the lower power supply, is the DC fail (or out fail) LED on?
— If yes, suspect the power supply. Try installing the power supply in the upper bay. If a second
power supply is present, move it to the lower bay. Turn both power supplies on to determine
whether the power supply or the power connector in the chassis is faulty, and then contact a
service representative with the results.
Is the AC power (input power) LED on for the second (redundant) power supply?
— If not, repeat each of the above procedures for the second power supply.