{
 "slug": "hp-probook-440-g6-fan-assembly-replacement",
 "title": "How to do an HP ProBook 440 G6 fan replacement (heat sink stays installed)",
 "model": "hp-probook-440-g6",
 "model_name": "HP ProBook 440 G6",
 "component": "fan-assembly",
 "manufacturer": "HP",
 "url": "https://laptoppartfinder.com/guides/hp-probook-440-g6-fan-assembly-replacement/",
 "api_url": "https://laptoppartfinder.com/api/guides/hp-probook-440-g6-fan-assembly-replacement",
 "source_url": "https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf",
 "source_title": "HP Maintenance and Service Guide",
 "pages": "printed pages 31–38, 50",
 "service_classification": "Authorized Service Provider chapter; HP restricts access to authorized service providers because damage or warranty loss can result.",
 "bench_tested": false,
 "markdown": "# HP ProBook 440 G6 fan replacement (heat sink stays installed)\n\nSource: https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf (printed pages 31–38, 50). OEM-documented procedure; not bench-tested.\n\nService classification: Authorized Service Provider chapter; HP restricts access to authorized service providers because damage or warranty loss can result. [HP manual, printed 47 / PDF 57](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=57)\n\nScope: Complete supplied fan module; heat sink stays installed; no impeller/motor rebuild.\n\n## Applicability and parts\n\n- Replace the complete documented fan module, retaining the installed heat sink and its thermal joint. No bare impeller/motor rebuilding or heat-sink replacement is covered.\n- Select the fan by the existing discrete versus UMA graphics configuration; these are not interchangeable upgrade recommendations.\n\nDOCUMENTED manual table options follow. A table entry is not serial-specific fit, present availability, upgrade approval or a shopping recommendation. Check the actual product/configuration before selecting a spare.\n\n| Spare | Documented description / constraint | Evidence |\n|---|---|---|\n| L44555-001 | Fan for discrete graphics; existing graphics configuration must match | [HP manual, printed 50 / PDF 60](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=60) |\n| L44556-001 | Fan for UMA graphics; existing graphics configuration must match | [HP manual, printed 50 / PDF 60](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=60) |\n\n## Tools and handling\n\n- Nonconductive nonmarking case tool\n- ESD protection and screw organizer\n- Phillips P1 driver\n\nThe model-specific preparation and handling citations are included in the first step. Use the correct driver for the actual head. Do not borrow screw, Battery Safe, keyboard-cable or memory-slot rules from another HP model.\n\n## Ordered procedure\n\nDOCUMENTED steps paraphrase HP. Reassembly expands HP’s reverse-procedure directions. Any combined order identified as PROPOSED is our own synthesis of those directions, not a separate HP or bench-verified instruction. No numeric torque or unprovided latch motion is added.\n\n1. **Prepare.** Confirm exact model and existing graphics configuration. Shut down through the operating system and disconnect external devices. Work on a clean ESD-protected surface with grounded handling precautions; handle boards/modules by edges, keep liquids away, and sort screws by original location. Do not bend, crush, puncture or use a sharp tool against a battery. Stop for a swollen/damaged pack or a hardware/connector mismatch. (DOCUMENTED) [HP manual, printed 36 / PDF 46](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=46); [HP manual, printed 31 / PDF 41](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=41); [HP manual, printed 32 / PDF 42](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=42); [HP manual, printed 33 / PDF 43](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=43); [HP manual, printed 34 / PDF 44](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=44); [HP manual, printed 35 / PDF 45](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=45)\n\n2. **Prepare.** Establish Battery Safe mode BEFORE opening: with the computer off and AC connected, press Windows + Backspace + Power, then turn on to initiate the mode. After it powers off, disconnect AC. In this mode the power button alone cannot turn it on without AC. Stop if mode cannot be established; do not substitute this sequence on another model. (DOCUMENTED) [HP manual, printed 36 / PDF 46](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=46)\n\n3. **Access.** With the closed computer supported upside down, remove the two Phillips M2.0 × 5.0 cover screws and loosen the five captive screws. Release under the display, lift the rear of the cover, and remove it. Keep all screws by location. (DOCUMENTED) [HP manual, printed 37 / PDF 47](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=47)\n\n4. **Isolate.** After Battery Safe mode and cover removal, remove the two Phillips M2.0 × 4.0 battery screws. Lift the battery top, use a nonconductive tool to push back the retaining tab at its bottom left, and lift the pack out. Do not invent a separate wired-battery disconnection for this illustrated pack. (DOCUMENTED) [HP manual, printed 38 / PDF 48](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=48)\n\n5. **Remove.** Disconnect the fan cable from the system board. Remove the two Phillips M2.0 × 4.0 fan screws and lift out the fan. Leave the separate heat sink installed; do not remove keyboard/display components for this documented route. (DOCUMENTED) [HP manual, printed 50 / PDF 60](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=60)\n\n6. **Install.** Seat the replacement fan matching the existing UMA/discrete configuration, restore the two Phillips M2.0 × 4.0 fan screws and reconnect its cable in its original route. Keep the wires clear of the fan and cover. (DOCUMENTED reverse-procedure direction) [HP manual, printed 50 / PDF 60](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=60)\n\n7. **Restore.** Refit the battery so its bottom-left retaining tab engages, lower it into place and restore the two Phillips M2.0 × 4.0 battery screws. Check its seating before replacing the cover. (DOCUMENTED reverse-procedure direction) [HP manual, printed 38 / PDF 48](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=48)\n\n8. **Close.** Check that every cable is seated and routed clear of the cover and that no screw/tool remains inside. Refit and seat the bottom cover, engaging its clips; restore two removable Phillips M2.0 × 5.0 screws and five captive screws to their original holes. No numerical torque is supplied here. (PROPOSED combined reassembly order, following OEM reverse-procedure directions) [HP manual, printed 37 / PDF 47](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=47); [HP manual, printed 37 / PDF 47](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=47)\n\n9. **Check.** Only after full reassembly, connect AC and press Power to leave Battery Safe mode. This is the OEM mode-exit sequence; no bench test has been performed. (DOCUMENTED) [HP manual, printed 36 / PDF 46](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=46)\n\n## Heat-sink and thermal-material boundary\n\nDo not lift the heat sink during this guide. The separate heat-sink section specifies discrete L44553-001, six captive heat-sink screws and two pairs; UMA L44552-001, four captive screws and one pair. If a thermal joint is disturbed, stop this fan-only guide and follow the correct separate OEM heat-sink procedure and its matching replacement-material kit/instructions. Clean and renew specified material each time that joint is opened. This guide does not supply pad thickness, paste quantity, torque or an invented tightening pattern. Preserve stamped removal order where specified; do not infer a new installation sequence. [HP manual, printed 51 / PDF 61](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=61); [HP manual, printed 52 / PDF 62](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=62); [HP manual, printed 53 / PDF 63](https://kaas.hpcloud.hp.com/pdf-public/pdf_13033544_en-US-1.pdf#page=63)\n\n## Proposed checks — all unperformed\n\n- UNPERFORMED: after full reassembly, power on and check for firmware fan/startup errors, abnormal rubbing/noise and unobstructed vents.\n- UNPERFORMED: use available HP diagnostics and observe temperature/fan behavior during ordinary operation. A temperature-controlled fan need not spin immediately at boot; this is not a benchmark or cooling-performance certification. Shut down if a fan error, abnormal heat or mechanical interference appears; isolate power before reopening.\n"
}