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 heat sink/fan assembly replacement. HP prints this procedure on printed page 55 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
821184-001- Heat sink/thermal module for use in models with UMA graphics (HP EliteBook 850 G4 Notebook PC models only). Source: printed page 55.821185-001- Heat sink/thermal module for use in models with discrete graphics. Source: printed page 55.
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
- Discrete graphics models (printed page 55).
- Discrete graphics models: The thermal material has to be thoroughly cleaned from the surfaces of the (printed page 56).
- UMA graphics models (printed page 56).
- UMA graphics models (printed page 57).
- Fit the replacement part by working back through the printed removal steps (printed page 57).
Part numbers in our catalog
- HP heat sink/thermal module with fans (15", discrete graphics) (821185-001)
- HP heat sink/thermal module with fans (15", UMA graphics) (821184-001)
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-heat-sink-fan-assembly-replacement-p55