HP EliteBook 840 Aero G8 Heat Sink Replacement

Written By: Spencer Day
  • Comments: 0
HP EliteBook 840 Aero G8 Heat Sink Replacement

Difficulty

Moderate

Steps

12

Time Required

20 - 30 minutes

Introduction

Use this guide to replace the heat sink in your HP EliteBook 840 Aero G8 laptop, or to reapply thermal paste.

If your replacement heat sink doesn't come with thermal paste pre-applied, you'll need new thermal paste.

Still under warranty? Contact HP to learn your warranty status, receive a repair under warranty if eligible, or for further warranty information.

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    • Before starting your repair, allow your laptop's battery to drain below 25%—a charged lithium-ion battery is a potential safety hazard if accidentally damaged.

    • Save your work, fully shut down your laptop, and unplug all cables.

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    • Despite the standards, Phillips screwdrivers can vary in size and shape—two drivers labeled as the same size may fit differently in the same screw. Use the size that fits the most snug into the screw head to avoid stripping it.

    • Use a Phillips screwdriver to fully loosen (but not remove) the five captive screws securing the bottom cover.

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    • Position your laptop so the rear edge (with the screen hinge) is closest to you.

    • Insert the flat end of a spudger between the rear edge of the bottom cover and the frame, near the middle screw and ELITEBOOK text.

    • If you're having trouble inserting your spudger, make sure the screw is fully loosened. If necessary, use your fingers to gently pull the screw up.

    • Use your spudger to pry up the cover to release the clip securing it.

    • Leave the spudger inserted under the bottom cover for the next step.

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    • Slide your spudger along the rear edge toward one of the corners to release the rear edge clips.

    • Rotate your spudger around the corner and up the edge to release the clips securing the short edge of the cover.

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    • Reinsert the flat end of a spudger near the ELITEBOOK text.

    • Repeat the previous step for the other side of the cover to release the remaining clips.

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    • Lift and remove the bottom cover.

    • The cover should lift away easily. If you feel resistance, use the flat end of a spudger to release any remaining clips, and check that all screws are fully loosened.

    • During reassembly, slide the clips along the front edge of the cover (opposite the hinge) into their slots on the frame, then lay the cover down. Press firmly around the perimeter to engage all of the clips.

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    • Position your laptop so the front edge (opposite the screen hinges) is closest to you.

    • Use the point of a spudger or your fingernail to push on alternating sides of the battery's sliding connector to walk it completely out of its socket.

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    • Depending on your laptop configuration, your device may have a metal shield or no cover at all.

    • Use tweezers or your fingers to peel up the bottom edge of the SSD cover.

    • If the cover is difficult to peel up, use an iOpener or hair dryer to lightly heat it. Be careful not to overheat the tape or the surrounding components.

    • Fold the SSD cover over, onto the memory module cover.

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    • Depending on your laptop configuration, your device may have a metal shield or no cover at all.

    • Grip the SSD and memory module covers together and peel them off.

    • If the cover is difficult to remove, use an iOpener or hair dryer to lightly heat it. Be careful not to overheat the tape or the surrounding components.

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    • Use a Phillips screwdriver to fully loosen (not remove) the four captive screws securing the heat sink. Loosen the screws in descending order based on the numbers stamped next to each screw.

    • During reassembly, tighten the heat sink screws a few turns at a time in ascending order based on the numbers stamped next to each screw., until snug. This will usually be in an "X" pattern.

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    • Be very careful not to pry on or damage any of the delicate surface‑mounted components around the heat sink.

    • Use the flat end of a spudger to pry up the top edge of the heat sink.

    • Thermal paste bonds the heat sink to the CPU. Depending on the age of your device and condition of the thermal paste, this may take some force. Pull up with constant, steady force to peel the heat sink away from the board.

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    • Lift and remove the heat sink.

    • During reassembly:

    • Check if your replacement heat sink comes with thermal paste pre‑installed on the bottom. If it does, do not apply new thermal paste.

    • Follow this guide to clean the CPU and apply new thermal paste.

    • If you're reusing the heat sink, make sure to clean it as well.

Conclusion

Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before you install it.

To reassemble your device, follow these instructions in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler. Depending on your region, used HP devices and parts can be returned for reuse or recycling through the HP Planet Partners program.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

Author

Spencer Day

Member since: 14/09/22

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