Field Notice: FN74073 - Some Cisco PWR4320 Power Supply Units May Experience Component Failure - Hardware Upgrade Available

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Updated:May 15, 2024

Document ID:FN74073

Bias-Free Language

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Notice

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected

Affected Product Name	Description	Comments
PWR-4320-AC	AC Power Supply for Cisco ISR 4320

Defect Information

Defect ID	Headline
CSCwc86408	ISR4321 PWR-4320-AC prematured failure with Date Code 2223

Problem Description

Some Cisco PWR-4320-AC power supply units may fail.

Background

Testing uncovered premature failure of the power supply unit due to a capacitor processing issue.

Problem Symptom

Premature failure and no power to the router during normal working condition may indicate this issue.

Workaround/Solution

Solution

First, identify an affected serial number using the Serial Number Verification tool. Then request a replacement using the standard Return Material Authorization (RMA) process.

How to Identify Affected Products

Use the Serial Number Verification tool to determine if a power supply unit is affected.

Serial Number Validation

Cisco provides the Serial Number Validation Tool to verify whether a device is impacted by this issue. To check the device, enter the serial number in the Serial Number Validation Tool.

Important: For security reasons, you must click the Serial Number Validation Tool link that is provided in this section. Do not copy and paste the link into a browser. Use of the Serial Number Validation Tool URL external to this field notice will fail.

Upgrade Program Information

Support Case Manager (SCM) must be used for ordering replacement parts for this Field Notice. To open SCM in a new tab, click the following link:
https://mycase.cloudapps.cisco.com/fieldnotice?fn=FN74073

SCM will validate eligibility and ensure that a request for a particular serial number has not already been submitted. If there is already a request, SCM will indicate RMA already submitted and NOT eligible for replacement.

Provide the following information:

Affected serial numbers. Note that a serial number entitlement check may be performed.
One ship-to address per request.
Service Request number (SR#). This is not required, but if one exists, enter it for better tracking purposes.

Order entry supports up to 50 serial numbers per request. For more than 50, submit additional requests.

Revision History

Version	Description	Section	Date
1.0	Initial Release	—	2024-MAY-15

For More Information

For further assistance or for more information about this field notice, contact the Cisco Technical Assistance Center (TAC) using one of the following methods:

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