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 850 G4. Confirm the exact model on the service label before starting.
HP EliteBook 850 G4 Notebook PC power button board replacement. HP prints this procedure on printed page 77 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
914750-001- Power button board assembly. Source: printed page 77.
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
- Detach the cable from the system board (1). (printed page 77).
- Take out the Phillips broadhead M2.0×2.0 screw that holds the power button board to the (printed page 77).
- Take out the 3 Phillips M2.5×5.0 screws from the left display hinge. (printed page 77).
- Rotate the hinge upward to reach the board (4). (printed page 77).
- Draw the tab at the left side of the board, and after that take the board from the machine (5). (printed page 78).
- Fit the replacement part by working back through the printed removal steps (printed page 78).
Part numbers in our catalog
- HP power button board (914750-001)
- HP USB/audio board (with cable) (916923-001)
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-850-g4-power-button-board-replacement-p77