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HP Z620 Workstation - Removing and Replacing Solenoid Hood Lock

Introduction
This document is provided to assist in removing and replacing the solenoid hood lock for the HP Z620 Workstation.
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
Torx T-15 driver
Parts required
  note:
Part numbers are subject to change.
The replacement part number will vary depending on the solenoid hood lock 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
Solenoid lock assembly - Includes lock, switch, and cable
641498-001 (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 solenoid hood lock, click here to view the HP Services Media Library and then click on Remove/Replace videos. On the new window, select Solenoid hood lock from the menu on the upper left hand side of the screen.
Solenoid hood lock removal
  note:
This video was developed using a pre-production version of the workstation. The chassis and parts shown might not exactly match the current production version, but the part removal and replacement steps are the same.
  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:
    Use the Computer Setup (F10) Utility to disable the solenoid lock before removing the access panel. If user does not know the password or in case of power loss or workstation malfunction, user will need a solenoid lock FailSafe Key - available from HP - to manually disable the solenoid lock.
      warning:
    To expose the solenoid lock security screws when the access cover cannot be unlocked user must break the top panel off by inserting a screwdriver under the front edge of the top panel and prying it away from the chassis.
  2. Disconnect the solenoid lock cable from the system board.
  3. Remove the long Torx-15 screw that secures the handle at the top rear of the chassis and remove the handle assembly.
      note:
    When removing the handle assembly be very careful not to move the metal handle relative to the plastic rear panel part to which it is attached or else the screw mounting holes may become misaligned making it difficult to reinstall the long screw.
  4. Push the front of the top panel back and lift it away from the chassis.
  5. Use the FailSafe Key to remove the two security screws that secure the solenoid bracket to the chassis wall.
  6. Remove the solenoid lock from the chassis.
Solenoid hood lock replacement
  1. Make sure the security arm through the solenoid is pushed all the way down in the disengaged position.
  2. Position the solenoid against the chassis.
  3. Replace the two security screws that secure the solenoid bracket to the chassis wall.
  4. Position the top panel over the slots in the top of the chassis and push forward until it locks into place.
  5. Position the handle assembly on the top rear of the chassis and replace the long Torx-15 screw.
  6. Connect the solenoid cable to the system board.
      note:
    To reset the solenoid hood lock after disengaging the solenoid, user must enable it in the Computer Setup (F10) utility. User must know the F10 Setup password to enable the lock. If user does not know the password, user can override it by pressing the CMOS button on the system board for 3-5 seconds. Then use F10 Setup to set a new password and enable the smart cover lock.
      caution:
    In addition to clearing the Setup password, pushing the CMOS button will reset CMOS values to factory defaults and will erase any customized information including asset numbers and special settings.
  7.   note:
    Please refer to the product-specific maintenance and service guide at for any future technical information and/or installation guidelines for this component. Click here to refer the product-specific maintenance and service guide.

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