HP EliteBook 840 G6 heat sink assembly replacement

Step-by-step HP EliteBook 840 G6 heat sink assembly replacement rewritten in our own words from HP's Maintenance and Service Guide, with page citations.

Part you needL62740-001HP heat sink L62740-001 for the HP EliteBook 840 G6
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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 39–53). 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 EliteBook 840 G6. Confirm the exact model on the service label before starting.

This guide covers replacing the heat sink assembly in the HP EliteBook 840 G6 Notebook PC. HP's Table 6-2 on printed page 51 lists the spare part numbers for the discrete and UMA graphics-memory variants.

Tools and parts

  • Pry tool (non-conductive, non-marking), magnetic Phillips P1 screwdriver, and Torx T8 screwdriver.
  • Static-safe work surface
  • L62751-001 - Heat sink assembly for models with discrete graphics memory. Source: printed page 51.
  • L62740-001 - Heat sink assembly for models with UMA graphics memory. Source: printed page 51.

Preparation

HP's preliminary requirements on printed page 32 set out the tools needed for removal and replacement work along with the service cautions that go with them. Follow the preparation steps on printed page 37: shut the computer down, pull the power cord out of the machine, and detach external devices; the bottom cover procedure on printed page 37 comes after that. Removed subassemblies and their screws belong away from the work area, plastic parts should not be forced, and cables are handled by their connectors and routed clear of the parts being lifted out (printed page 32). For this procedure the battery cable on printed page 49 has to come off the system board before the heat sink is handled.

Replacement

  1. Get the computer ready for disassembly before any cover is lifted (printed page 39).
  2. Take the bottom cover off the chassis so the interior is exposed (printed page 39).
  3. Unplug the battery cable from the system board (printed page 39).
  4. If the model has discrete graphics memory, work the six captive screws loose in the sequence stamped on the heat sink and lift the heat sink off the system board (printed pages 51, and 51).
  5. Scrub the old thermal material off the heat sink and the system board surfaces and use the replacement thermal material supplied with the spare part kits (printed pages 52, and 51).
  6. If the model has UMA graphics memory, work the four captive screws loose in the sequence stamped on the heat sink and lift the heat sink off the system board (printed pages 53, and 53).
  7. Install the heat sink by reversing the removal steps, seating it on the system board and tightening the captive screws in reverse of the stamped sequence (printed page 53).

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-elitebook-840-g6-heat-sink-assembly-replacement-p51

Key facts

HP document part number
L54460-001
Model
HP EliteBook 840 G6
Release year
2019
Screen size
14"
Printed pages
39–53

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