HP Chromebook 14a usb board replacement

Step-by-step HP Chromebook 14a usb board replacement rewritten in our own words from HP's Maintenance and Service Guide, with page citations.

On this page
  1. Applies to
  2. Tools and parts
  3. Preparation
  4. Replacement
  5. 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 29–36). 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 Chromebook 14a. Confirm the exact model on the service label before starting.

Chromebook 14a usb board replacement. HP prints the spare part table for this procedure on printed page 35.

Tools and parts

  • Tweezers, a pry tool that neither conducts nor marks and a magnetic Phillips P1 driver
  • Static-safe work surface
  • L91522-001 - USB board for use in models with Celeron N4000/N4020 or Pentium Silver N5030 processors. Source: printed page 35.
  • M74071-001 - USB board for use in models with Pentium Silver N6000 or Celeron N4500 processors. Source: printed page 35.
  • L73309-001 - USB board cable, high speed. Source: printed page 35.
  • L73310-001 - USB board cable, low speed. Source: printed page 35.

Preparation

HP prints its tools list and its handling and electrostatic-discharge cautions on printed page 18. Its preparation for disassembly is on printed page 27: power the unit down through the operating system, unplug the power cord and detach every external device before opening it. Work on a grounded, static-safe surface, keep screws grouped by the position they came from, and handle boards and modules by their edges.

Replacement

  1. Get the computer ready for disassembly (see that procedure on page 27). (printed page 29).
  2. Take off the bottom cover (see that procedure on page 27). (printed page 30).
  3. Detach the battery cable from the system board (see that procedure on page 29). (printed page 31).
  4. Detach the top cable from the USB board (1). (printed page 35).
  5. Detach the two flat ribbon leads from the two reverse ZIF headers on the USB board (2). (printed page 36).
  6. Take out the four Phillips M2.0 × 3.5 screws that hold the board to the computer. (printed page 36).
  7. Lift the board out of the computer (4). (printed page 36).
  8. Install the usb board by working back through the printed removal steps (printed page 36).

Manufacturer manual

HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-chromebook-14a-usb-board-replacement-p35

Key facts

HP document part number
M74093-001
Model
HP Chromebook 14a
Release year
2021
Screen size
14"
Printed pages
29–36

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