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HP Z420 Workstation - Removing and Replacing the Memory Fan Assembly

Introduction
This document is provided to assist in removing and replacing the memory fan assembly for the HP Z420 Workstation.
Minimum skill level
The end user should possess product-specific knowledge and technical skill on how to service the system, and have familiarity with the operating system.
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the memory fan assembly that is being replaced. If a part is listed as "Yes" under "Requires Return", then the defective part needs to be returned to HP.
Description
Part Number
Requires Return
Cooling Fan Assembly with Rear Memory Duct
663345-001 (Modified)
Yes
  note:
For customers in countries/regions with RoHS legislation (e.g. EU, China, etc.) restricting the use of hazardous substances in electrical equipment. The use of the "Original" spare part is regulated by RoHS legislation. If the unit contains a part that is labeled with the "Modified" spare number, the "Modified" spare part must be ordered as the replacement part. If the unit contains a part that is labeled with the "Original" spare number, please order the "Original" spare number as the replacement part. In this case, either the "Original" or the "Modified" spare number may be shipped which will not affect performance or functionality of the unit.
Summary of instructions
To view a video demonstrating the procedure for removing the memory fan assembly, click here to view the HP Services Media Library and then click on Remove/Replace videos. On the new window, select Memory fan assembly from the menu on the upper left hand side of the screen.
Memory fan assembly removal
  1. Review the safety considerations before performing the steps listed below by clicking on the following link:
      caution:
    Failure to comply with the precautions could result in damage to the product or loss of data.
  2. Grasp the memory fan assembly and press the release tab at the green touch point.
  3. Lift the assembly straight up and disconnect the memory fan cable from the system board.
  4. Remove the assembly.
Memory fan assembly replacement
  1. Connect the memory fan cable to the system board.
  2. Align the memory fan assembly with the guide channels on the system fan holder and lower it into the chassis.
  3. Press down on the assembly until it snaps into place.

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