HP EliteBook 840 G2 power button board replacement

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

Part you need730959-001HP Power button board with cable 730959-001 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. Parts this procedure uses
  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 58–95). 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 power button board replacement. HP prints this procedure on printed page 94 of its maintenance and service guide, and the spare-part table for this part is on printed page 39.

Tools and parts

  • Screwdrivers and a non-marking pry tool as HP lists for this procedure
  • Static-safe work surface
  • 730959-001 - Power button board (includes cable). Source: printed page 94.

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), and after that take the following parts out: (printed page 83).
  5. Free the ZIF connector (1) that carries the power button board lead is connected, and after that detach the power button board lead from the main board. (printed page 94).
  6. Undo the Phillips PM2.0×3.0 broad head fastener (2) that holds the power button board to the top cover. (printed page 94).
  7. Slide the power button board (3) towards the inside of the top cover, and after that lift it off the top cover. (printed page 95).
  8. Fit the replacement part by working back through the printed removal steps (printed page 95).

Parts this procedure uses

Manufacturer manual

HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-elitebook-840-g2-power-button-board-replacement-p94

Key facts

HP document part number
781074-002
Model
HP EliteBook 840 G2
Release year
2015
Screen size
14"
Printed pages
58–95

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