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Cisco7609 Internet Router Installation Guide
OL-5079-04
Chapter4 Troubleshooting
Troubleshooting the Power Supply
Troubleshooting the Power Supply
Perform these steps when troubleshooting the power supply to iso late a power
subsystem problem:
Step 1 Verify that the INPUT OK LED on the power supply is green.
•If the INPUT OK LED is green, the AC or DC source is good and the power
supply is functional.
•If the INPUT OK LED is off, first ensure that the power supply is flush with
the back of the chassis. Turn off the power switch, tighten the captive
installation screw(s), and then turn on the power switch.
•If the INPUT OK LED remains off, there might be a problem with the AC or
DC source, or the power cable.
Turn off the power to the switch, connect the power cord to another power
source if one is available, and turn on the power switch.
•If the INPUT OK LED is green, the problem is the first power source .
•If the INPUT OK LED fails to light after you connect the power supply to a
new power source, replace the power cord, and turn on the switch.
•If the INPUT OK LED then goes on, return the first power cord for
replacement.
If this unit has more than one power cord, repeat Step 1 for each power supply.
If the INPUT OK LED still fails to light when the switch is connected to a
different power source with a new power cord, the power supply is probably
faulty.
If a second power supply is available, install it in the second power supply bay
and contact a customer service representative for further instructions.
Step 2 If you have a second (redundant) power supply, repeat Step 1 for this power
supply.
If you are unable to resolve the problem or if you determ ine that either a power
supply or backplane connector is faulty, see the “Contacting Customer Service”
section on page 4-7.