HP ProBook 450 G4 heat sink assembly replacement

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

Part you need907364-001HP heat sink assembly (discrete graphics) 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. Part numbers in our catalog
  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 33–81). 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 heat sink assembly replacement. HP prints this procedure on printed page 79 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
  • 907364-001 - Heat sink for use in models with discrete graphics. Source: printed page 79.
  • 907359-001 - Heat sink for use in models with UMA graphics. Source: printed page 79.

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. Detach every external device wired to the machine. (printed page 68).
  3. Cut the power by pulling the cord out of the wall outlet, and after that unplugging the AC adapter from the machine. (printed page 68).

replacement

  1. Take the following parts out: a. Service door (the Service door section is on page 33). b. Hard drive (the Hard drive section is on page 36) c. Optical drive (the Optical drive section is on page 34) d. WLAN module (the WLAN/Bluetooth combo card section is on page 40) e. WWAN module (the WWAN module section is on page 42) f. Keyboard (the Keyboard section is on page 45) g. Top cover (the Top cover section is on page 52) h. Battery (the Battery section is on page 66) i. Main board (the main board section is on page 74) (printed page 79).
  2. Place the main board upside-down. (printed page 79).
  3. Discrete models: Inside the order indicated on the heat sink, back off the 6 captive Phillips fasteners (1)–(6) that hold the heat sink to the main board. (printed page 79).
  4. Lift the heat sink from the main board (7). (printed page 80).
  5. UMA models: Inside the order indicated on the heat sink, back off the 4 captive Phillips fasteners (1)–(4) that hold the heat sink to the main board. (printed page 80).
  6. Lift the heat sink from the main board (5). (printed page 81).
  7. Fit the replacement part by working back through the printed removal steps (printed page 81).

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-heat-sink-assembly-replacement-p79

Key facts

HP document part number
903116-001
Model
HP ProBook 450 G4
Release year
2016
Screen size
15.6"
Printed pages
33–81

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