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 86). 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 ProBook 640 G1. Confirm the exact model on the service label before starting.
HP ProBook 640 G1 Notebook PC power button board replacement. HP prints this procedure on printed page 86 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
738701-001- For 15.6-in. models. Source: printed page 86.738399-001- For 14-in. models. Source: printed page 86.
Preparation
Save your work, shut the computer down through the operating system, unplug AC power and every external device, and work on a grounded, static-safe surface.
Replacement
- Shut the computer down through the operating system, unplug the power cord, and disconnect every external device. (printed page 86).
- Remove the battery, service cover, hard drive, optical drive, keyboard and base enclosure first. (printed page 86).
- Turn the top cover over with the front edge pointing at you, back out the two Phillips PM2.0x3.0 screws (1), and take the board (2) and its lead out. (printed page 86).
Parts this procedure uses
- HP Power button board with cable 738701-001 (738701-001)
- HP For 14-in. models 738399-001 (738399-001)
Manufacturer manual
HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-probook-640-g1-notebook-pc-power-button-board-replacement-p86