HP Elite c640 14 inch G3 Chromebook bottom cover replacement

Step-by-step HP Elite c640 14 inch G3 Chromebook bottom cover replacement rewritten in our own words from HP's Maintenance and Service Guide, with page citations.

Part you needN12890-001HP bottom cover N12890-001 for the HP Elite c640 14 inch G3 Chromebook
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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 29–30). 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 Elite c640 14 inch G3 Chromebook. Confirm the exact model on the service label before starting.

HP Elite c640 14 inch G3 Chromebook™ bottom cover replacement. HP prints this procedure on printed page 28 of its maintenance and service guide, and the spare-part table for this part is on printed page 28.

tools and parts

  • Screwdrivers and a non-marking pry tool as HP lists for this procedure
  • Static-safe work surface
  • N12890-001 - Bottom cover for use in models with WWAN. Source: printed page 28.
  • N12891-001 - Bottom cover for use in models with WLAN. Source: printed page 28.

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. Take the four Phillips M2.5 × 6.0 fasteners (1) out of the top and the two Phillips M2.0 × 4.0 fasteners (2) from the bottom of the bottom cover. (printed page 29).
  2. Open the screen to 90° (1). (printed page 29).
  3. While holding the bottom edge of the machine, place your thumbs at the upper cover, below the keyboard as well as to the left as well as right of the touchpad (2), and after that push and pull up to free the bottom cover. (printed page 29).
  4. Close the machine and place it upside down (3). (printed page 29).
  5. Pull the bottom cover off the machine by drawing up at the seam between the hinges (4). (printed page 29).
  6. When replacing the lower cover, make sure the gold metal strip (1) as well as silver rectangular foil (2) are installed and intact. (printed page 30).

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-elite-c640-14-inch-g3-chromebook-bottom-cover-replacement-p28

Key facts

HP document part number
N17284-001
Model
HP Elite c640 14 inch G3 Chromebook
Release year
2022
Screen size
14"
Printed pages
29–30

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