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HP ProBook 4535s Notebook PC - Removing and Replacing the Lid Switch Board

Introduction
This document is provided to assist in removing and replacing the lid switch board for the HP ProBook 4535s 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.
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the lid switch board 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
Display lid switch
646289-001 (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 labelled with the Modified Spare number, the Modified Spare must be ordered as the replacement part. If your unit contains a part that is labelled 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 lid switch board, click on the link below. Or use the product video listing on the HP Services Media Library (Click here to go to Service Media Library), then select Lid switch board from the menu on the upper left hand side of the screen.
Click here to view the lid switch board removal video (right-click on the link to open in a new window/tab).
Lid switch board removal
  caution:
Observe all precautions when removing and replacing components.
  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. Gently lift up on the locking bar of the lid switch board ZIF connector open and remove the lid switch board ribbon cable.
      note:
    Use care to prevent damaging the ZIF connector and ribbon cable.
  3. Lift the lid switch board from the base enclosure.
      note:
    The lid switch board is held in place with double-sided adhesive.
  4. Place the lid switch board and cable in a static dissipative bag.
Lid switch board replacement
  1. Grasp the lid switch board by the edges and remove it from the static dissipative bag.
  2. Align the lid switch board over the alignment pins built into the base enclosure.
  3. Press down on the lid switch board to adhere it to the base enclosure.
  4. Insert the lid switch board ribbon cable into the ZIF connector on the system board and gently press down on the ZIF connector locking bar.
      note:
    Use care to prevent damaging the ZIF connector and ribbon cable.

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