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HP ProBook 4421s Notebook PC - Removing and Replacing the Switch Cover

Introduction
This document is provided to assist in removing and replacing the switch cover for the HP ProBook 4421s Notebook PC.
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.
Tools required
Small, Phillips-head (P1) screwdriver.
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the switch cover 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
Switch cover - For use on models with 14.0-inch displays - Includes power button board
599568-001 (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 your unit contains a part that is labeled with the Modified Spare number, the Modified Spare must be ordered as the replacement part. If your unit contains a part that is labeled with the Original Spare number, please order the Original Spare as the replacement part. In this case either the Original Spare or the Modified Spare 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 switch cover, click on the link below. Or use the product video listing on the HP Services Media Library (Click here to go to HP Services Media Library), then select Switch cover from the menu on the upper left hand side of the screen.
Click here to view the switch cover removal video (right-click on the link to open in a new window/tab).
Switch cover 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 your product or loss of data.
  2. Remove the four 3 mm P1 Phillips-head screws in the battery bay that secure the switch cover to the base enclosure.
  3. Turn the notebook right side up and open the display fully.
  4. Slide the switch cover toward the rear of the notebook.
  5. Remove the switch cover from the base enclosure.
Switch cover replacement
  1. Place the switch cover onto the base enclosure.
  2. Align the sides, hinge cut outs, and toes with the sides, hinges, and slots of the base enclosure.
  3. Press down on the switch cover and slide it toward the center of the notebook.
  4. Close the display and turn the notebook upside down.
      note:
    Ensure that the four tabs on the rear edge of the switch cover are properly seated in their respective notches in the battery bay.
  5. Replace the four 3 mm P1 Phillips-head screws into the battery bay that secure the switch cover to the base enclosure.

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