HP ProBook 450 G4 power button board replacement

Step-by-step HP ProBook 450 G4 power button board replacement rewritten in our own words from HP's Maintenance and Service Guide, with page citations.

Part you need905769-001HP Optical drive cable and connector 905769-001 for the HP ProBook 450 G4
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On this page
  1. Applies to
  2. tools and parts
  3. preparation
  4. replacement
  5. Parts this procedure uses
  6. Part numbers in our catalog
  7. 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 33–59). 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 450 G4. Confirm the exact model on the service label before starting.

HP ProBook 450 G4 Notebook PC power button board replacement. HP prints this procedure on printed page 58 of its maintenance and service guide, and the spare-part table for this part is on printed page 58.

tools and parts

  • Screwdrivers and a non-marking pry tool as HP lists for this procedure
  • Static-safe work surface
  • 905754-001 - Power button board assembly. Source: printed page 58.
  • 905769-001 - Power button board cable (included in Cable Kit). Source: printed page 58.

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.

  1. Power the machine down. If you are unsure whether the machine is off or in Hibernation, turn the machine on, and after that shut it down through the operating system. (printed page 33).
  2. Place the machine in “Battery Safe mode” (the Battery Safe mode section is on page 32). (printed page 33).
  3. Detach every external device wired to the machine. (printed page 33).
  4. Cut the power by pulling the cord out of the wall outlet, and after that unplugging the AC adapter from the machine. (printed page 33).
  5. Place the top cover upside-down. (printed page 56).

replacement

  1. Take the following parts out: a. Service door (the Service door section is on page 33) b. Optical drive (the Optical drive section is on page 34) c. Hard drive (the Hard drive section is on page 36) d. Keyboard (the Keyboard section is on page 45) e. Top cover (the Top cover section is on page 52) (printed page 58).
  2. Detach the lead from the connector on the board (1). (printed page 58).
  3. Undo the Phillips PM2.0×3.0 fastener (2) that holds the board to the top cover. (printed page 58).
  4. Raise the left side of the board (3), and after that draw the board out and to the left to lift it out from under the tabs (4). (printed page 58).
  5. If you need to replace the lead, note the lead routing path through the top cover (5). (printed page 59).
  6. Fit the replacement part by working back through the printed removal steps (printed page 59).

Parts this procedure uses

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-probook-450-g4-power-button-board-replacement-p58

Key facts

HP document part number
903116-001
Model
HP ProBook 450 G4
Release year
2016
Screen size
15.6"
Printed pages
33–59

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