HP ProBook 640 G3 Fan and Heat Sink Replacement

Escrito Por: Tej Sai Kakumanu
  • Comentários: 0
HP ProBook 640 G3 Fan and Heat Sink Replacement

Dificuldade

Moderate

Passos

11

Tempo necessário

15 - 25 minutes

Introdução

This guide details the process for replacing the fan and heat sink in your HP ProBook 640 G3, which is a necessary repair if your laptop is overheating, making loud or grinding noises, or shutting down randomly. A broken or failing fan can lead to prolonged overheating, risking permanent damage to internal components like the CPU and motherboard. This replacement is also indicated if you receive a "System Fan (90B) Error" message upon boot-up.

The repair is rated as Moderate difficulty and is estimated to take 15–25 minutes. Before beginning, observe the critical safety caution: ensure the device is completely powered down and disconnected from all charging sources.

This guide requires several preliminary steps, including the removal of the battery, memory, and Wi-Fi card, making screw organization especially important. The tools you will need are a Phillips #00 Screwdriver, Plastic prying tools, an Opening Pick, and Tweezers.

  1. ajYHFSfGJtrWjIxq
    ajYHFSfGJtrWjIxq
    TRtQxJWNiaIiXNCN
    yomKKfYB2DeNybOw

    • Use a Phillips screwdriver to loosen the seven 6 mm-long captive screws securing the battery.

    • These screws are built into the edges of the battery, so they only need to be loosened in order for the battery to be taken out.

  2. EiKqpnKGfaYOZJSJ
    EiKqpnKGfaYOZJSJ
    2BMIbSdr4EAJJYrO
    eb2fAEfRgLFYENce

    • Remove the battery.

    • If the battery will not come out, you may need to loosen the screws more; refer back to step 2.

  3. Ev1aNLbrCFAL6jau
    Ev1aNLbrCFAL6jau
    fmgEwYeguxbYmq4R
    KMbfEgucrXCJPmsR

    • Two clips secure each RAM module in place, one on each side. Using your fingers, spread the clips away from the RAM module.

    • Gently remove the memory from its housing by pulling it out and up.

    • Retention arms are thin and fragile, be careful when unhooking them.

  4. TXdGDvGKM5lU1yge
    TXdGDvGKM5lU1yge
    XttkIUYLi44MrodO
    Tt5bRgnTACyLMPkH

    • Repeat the previous step for the second memory card.

    • During reassembly, the memory card can be slid back into its slot and gently pushed down. The retention arms will then secure around the card on their own and don't need to be pried open.

  5. TNLHPLXDMaALRTtF

    • Use a Phillips screwdriver to remove the two 6 mm-long screws on the metal piece holding down the Wi-Fi card. One screw will be on top, and the other will be just next to the wires holding it in.

    • Carefully remove the little metal piece from where it was resting.

    • The metal piece is small and non-magnetic. Leave in clear line of sight to avoid losing it.

  6. 4UWyTXKyhFnuP12D

    • The only thing holding the Wi-Fi card will be two small wires. These can easily be taken off by the use of your hands or helpful tweezers.

    • Gently remove the card by pulling it out of its slot.

  7. HpvHGHrU21MclO3D

    • There are 22 total screws that hold down the base of the laptop. These vary between flat head Phillips and Torx head screws.

    • From here we've labeled the Torx screws as squares and the Phillips screws as circles. In case of any contradictions between your device's labels or current screws and this guide, we recommend going by the device's labels.

    • Remove the 2 M2.0x6

    • Remove the 8 M2.5x6 screws

    • Remove the 6 M2.0x3

    • The two screws here are M2.5x3 and M2.0x3. In the case of our device, these screws were like the battery screws, as in they did not need to be removed to continue. This could be the case with your device but if not, feel free to remove them.

    • These screws will be smaller than M2.0x3, consider sizes such as M2.0x2, M2.0x1.5, M2.0x1 and possibly smaller.

    • We highly recommend the usage of a magnetic strip to keep track of the screws being removed and replaced to avoid confusion.

  8. LhKGDIZnrMe1DWlJ
    LhKGDIZnrMe1DWlJ
    Fa6D3jMVDXoTRICM
    DWlk6HScvWX6s4RL

    • Pull the DVD disk out.

  9. dCPEGdqCtRujrQKq

    • Locate the row of four screws along the edge of the optical drive bay (the empty slot where the DVD drive was).

    • Remove the two screws on the left (closer to the hinge/connectors). These are typically M2.0 x 3mm.

    • Remove the two screws on the right (closer to the front corner). These are typically smaller, M2.0 x 1.5mm.

    • As mentioned in prior steps, the plastic chassis is often labeled next to the screw holes with the size (e.g., "M2.0x3" or "M2.0x1.5") to help you identify which screw goes where during reassembly.

  10. UTy113uZUQlUbccH
    UTy113uZUQlUbccH
    FPMnQoEENd5wlq1m
    MAs2lsvVEUkHleNy

    • Insert your opening pick into the seam between the top palm rest assembly (where the keyboard is) and the bottom case.

    • Slide the pick along the front and side edges to release the internal plastic clips securing the top cover.

    • Once the clips are disengaged, gently lift the keyboard compartment away to reveal the motherboard components underneath.

  11. vp3wJDKQo2FQnLqD
    vp3wJDKQo2FQnLqD
    KYTnBdP2GRdxUJ1M
    xAKlxqHk2UHtl4os

    • This step is not required for replacing the screen

    • Use the Phillips head screwdriver to loosen the M2.5x1.5 screws.

    • Use the Phillips head screwdriver to loosen the M2.5x3 screw.

    • Loosen the M2.5x3.5 screws with the Phillips head screwdriver

    • Carefully detach the cooling fan and its connection from the device.

    • Just like our battery, the screws are attached to the cooling fan and its connector. The batteries connected to the attached component are done so with springs.

Conclusão

To reassemble your device, follow the above steps in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting or ask our Answers community for help.

Autor(a)

Tej Sai Kakumanu

Membro desde: 15/10/25

473 Reputação

0 comentários