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HP Pro 3400 Microtower PC - Removing and Replacing the Access Panel

Introduction
This document is provided to assist in removing and replacing the access panel for the HP Pro 3400 Microtower PC.
Minimum skill level
The end user requires no hardware-specific training to replace the defective part. The end user should have familiarity with system hardware and software requiring repair.
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the access panel that is being replaced. If a part is listed as "Yes" under "Requires Return", then the defective part needs to be returned to HP. Click here for more information on returning parts to HP.
Description
Part Number
Requires Return
Access panel
667851-001 (Modified)
Yes
  note:
For end users 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 access panel, click here to view the HP Services Media Library and then click on Remove/Replace videos. On the new window, select Access Panel from the menu on the upper left hand side of the screen.
Access panel 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.
      note:
    Remove any CD or DVDs from the unit’s optical drive. Remember to detach all cables that connect to the unit. Whenever working on internal components, use an anti-static mat. Wear an ESD wrist strap attached to the unit when working with sensitive components that are inside the unit to avoid damaging them. Make sure to ground the chassis to the mat.
  2. Detach the screw on the rear of the unit that connects the panel to the unit.
  3. Grasp the handle on the panel and pull towards the back of the unit.
  4. Remove the panel from the unit.
Access panel replacement
  1. The access panel has several tabs on its top, bottom, and leading edges, which fit into slots and over the front lip of the unit.
  2. To reattach the panel, align the tabs on the panel over the corresponding slots on the unit and lay the panel into place.
  3. Slide the panel forward until flush with the front bezel edge to lock it into position.
  4. Replace the screw to secure the panel to the unit.

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