HP EliteBook 840 G2 base enclosure replacement

Step-by-step HP EliteBook 840 G2 base enclosure replacement rewritten in our own words from HP's Maintenance and Service Guide, with page citations.

Part you need779684-001HP bottom cover 779684-001 for the HP EliteBook 840 G2
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On this page
  1. Applies to
  2. Tools and parts
  3. Preparation
  4. Replacement
  5. Part numbers in our catalog
  6. Manufacturer manual
Source: steps rewritten in our own words (no more than 8 words in a row copied; part numbers, screw sizes and warnings kept as printed) from HP's Maintenance and Service Guide (PDF, printed pages 58–83). Not bench-tested. We have not performed this repair; keep HP's manual open for its illustrations. Scope restrictions below are part of the guide: do not apply it to other models, generations or configurations. Service manuals are written for trained technicians; work at your own risk.

Labels: DOCUMENTED = taken from HP's manual; PROPOSED = our own joining or ordering of HP's directions, not an HP instruction; UNPERFORMED = a suggested check that has not been carried out.

Applies to

HP EliteBook 840 G2. Confirm the exact model on the service label before starting.

HP EliteBook 840 G2 Notebook PC base enclosure replacement. HP prints this procedure on printed page 81 of its maintenance and service guide.

Tools and parts

  • Screwdrivers and a non-marking pry tool as HP lists for this procedure
  • Static-safe work surface
  • 779684-001 - For use only on HP EliteBook 840 G2 Notebook PC and HP EliteBook 740 G2 Notebook PC computer models. Source: printed page 81.
  • 795946-001 - For use only on HP ZBook 14 G2 Mobile Workstation computer models. Source: printed page 81.

Preparation

Save your work and shut the computer down through the operating system, unplug AC power and every external device, and work on a clean, grounded, ESD-protected surface while sorting each screw by its original location. Handle every cable by its connector and put each one back in its own place during reassembly.

Replacement

  1. Power the machine down. If you cannot tell whether the machine is off or in Hibernation, turn the machine on, and after that shut it down through the operating system. (printed page 58).
  2. Cut the power from the machine by unplugging the power cord from the machine. (printed page 58).
  3. Detach every external device from the machine. (printed page 58).
  4. Take the service cover off (the Service cover section is on page 57). (printed page 59).
  5. Take the battery out (the Battery section is on page 59). (printed page 60).
  6. Take the keyboard (the Keyboard section is on page 69). (printed page 81).
  7. Close the machine. (printed page 81).
  8. Place the machine upside down with the rear panel toward you. (printed page 81).
  9. Take the eight rubber fastener covers. (printed page 81).
  10. Take the sixteen Torx T8M2.5×5.0 fasteners that hold the base enclosure to the machine. (printed page 82).
  11. Take the Phillips PM2.0×8.0 fastener (1) near the media card reader that holds the base enclosure to the machine. (printed page 82).
  12. Take the five Phillips PM2.0×5.0 broad head fasteners (2) inside the battery bay that hold the base enclosure to the machine. (printed page 82).
  13. Lift the base enclosure off the machine. (printed page 83).
  14. Fit the replacement part by working back through the printed removal steps (printed page 83).

Part numbers in our catalog

Check each part page for its source and variant notes before ordering.

Manufacturer manual

HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-elitebook-840-g2-base-enclosure-replacement-p81

Key facts

HP document part number
781074-002
Model
HP EliteBook 840 G2
Release year
2015
Screen size
14"
Printed pages
58–83

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