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 455 G4. Confirm the exact model on the service label before starting.
HP ProBook 455 G4 Notebook PC heat sink assembly replacement. HP prints this procedure on printed page 79 of its maintenance and service guide, and the spare-part table for this part is on printed page 79.
tools and parts
- Flat-bladed drivers, Phillips P0 and P1 drivers and Torx T8 drivers
- Static-safe work surface
preparation
HP prints its tools list and its handling and electrostatic-discharge cautions on printed page 27. Work on a grounded, static-safe surface, keep screws grouped by the position they came from, and handle boards and modules by their edges.
replacement
- Position the system board upside-down. (printed page 79).
- Discrete models: In order indicated on heat sink, loosen the 6 captive Phillips screws– that hold the heat sink to the system board. (printed page 79).
- Lift the heat sink from the system board. (printed page 80).
- UMA models: In order indicated on heat sink, loosen the 4 captive Phillips screws– that hold the heat sink to the system board. (printed page 80).
- Lift the heat sink from the system board. (printed page 81).
- Put the heat sink assembly back by repeating the printed removal moves in the opposite order (printed page 81).
Manufacturer manual
HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-probook-455-g4-heat-sink-assembly-replacement