hp-support-head-portlet

Actions
Loading...

Welcome to HP Customer Support

hp-contact-secondary-navigation-portlet

Actions
Loading...

hp-share-print-widget-portlet

Actions
Loading...

hp-concentra-wrapper-portlet

Actions
Loading...

HP ProBook 4421s Notebook PC - Removing and Replacing the Keyboard

Introduction
This document is provided to assist in removing and replacing the keyboard for the HP ProBook 4421s Notebook 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.
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 keyboard 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
Keyboard assembly
599573-xx1 (Modified)
Yes
The part number will vary based on the country. Click here for a list of country specific spare part numbers.
  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 keyboard, 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 Keyboard from the menu on the upper left hand side of the screen.
Click here to view the keyboard removal video (right-click on the link to open in a new window/tab).
Keyboard 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 three 3 mm P1 Phillips-head screws that secure the keyboard to the top cover.
  3. Remove the 4 mm P1 Phillips-head screw that secures the keyboard to the top cover.
  4. Slide the keyboard toward the rear of the notebook until the tabs on the front of the keyboard are free from their respective slots on the top cover.
  5. Flip the keyboard toward the right side of the notebook and rest it face down.
  6. Gently lift the locking bar on the keyboard ZIF connector and remove the ribbon cable.
      note:
    Use care to prevent damaging the ZIF connector and ribbon cable.
  7. Remove the keyboard from the base enclosure.
Keyboard replacement
  1. Place the keyboard face down on the right edge of the notebook.
  2. Insert the keyboard ribbon cable into the ZIF connector on the system board.
      note:
    Use care to prevent damaging the ZIF connector and ribbon cable.
  3. Push the locking bar down to secure the keyboard cable in the ZIF connector.
  4. Flip the keyboard toward the center of the notebook and align the tabs on the front of the keyboard with the slots on the top cover.
  5. While pressing down on the front and rear edges, slide the keyboard forward until it is securely seated under the lip of the palm rest.
  6. Replace the 4 mm P1 Phillips-head screw that secures the keyboard to the top cover.
  7. Replace the three 3 mm P1 Phillips-head screws that secure the keyboard to the top cover.

hp-feedback-input-portlet

Actions
Loading...

hp-online-communities-portlet

Actions
Loading...

Ask the community!


Support Forum

Support Forum

Join the conversation! Find Solutions, ask questions, and share advice with other HP product owners. Visit now


hp-feedback-banner-portlet

Actions
Loading...

hp-country-locator-portlet

Actions
Loading...
Country: Flag United Kingdom

hp-detect-load-my-device-portlet

Actions
Loading...