{
 "slug": "hp-probook-450-g4-heat-sink-assembly-replacement-p79",
 "title": "How to do an HP ProBook 450 G4 heat sink assembly replacement",
 "model": "hp-probook-450-g4",
 "model_name": "HP ProBook 450 G4",
 "component": "heat sink assembly",
 "manufacturer": "HP",
 "url": "https://laptoppartfinder.com/guides/hp-probook-450-g4-heat-sink-assembly-replacement-p79/",
 "api_url": "https://laptoppartfinder.com/api/guides/hp-probook-450-g4-heat-sink-assembly-replacement-p79",
 "source_url": "https://h10032.www1.hp.com/ctg/Manual/c05270979.pdf",
 "source_title": "HP Maintenance and Service Guide",
 "pages": "printed pages 33–81",
 "service_classification": null,
 "bench_tested": false,
 "markdown": "# HP ProBook 450 G4 heat sink assembly replacement\n\nSource: https://h10032.www1.hp.com/ctg/Manual/c05270979.pdf (printed pages 33–81). OEM-documented procedure; not bench-tested.\n\nHP ProBook 450 G4 Notebook PC heat sink assembly replacement. HP prints this procedure on printed page 79 of its maintenance and service guide.\n\n## tools and parts\n\n- Screwdrivers and a non-marking pry tool as HP lists for this procedure\n- Static-safe work surface\n- `907364-001` - Heat sink for use in models with discrete graphics. Source: printed page 79.\n- `907359-001` - Heat sink for use in models with UMA graphics. Source: printed page 79.\n\n## preparation\n\nSave 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.\n\n1. Power the machine down. If you are unsure whether the machine is off or in Hibernation, turn the machine on, and after that shut it down through the operating system. (printed page 33).\n2. Detach every external device wired to the machine. (printed page 68).\n3. Cut the power by pulling the cord out of the wall outlet, and after that unplugging the AC adapter from the machine. (printed page 68).\n\n## replacement\n\n4. Take the following parts out: a. Service door (the Service door section is on page 33). b. Hard drive (the Hard drive section is on page 36) c. Optical drive (the Optical drive section is on page 34) d. WLAN module (the WLAN/Bluetooth combo card section is on page 40) e. WWAN module (the WWAN module section is on page 42) f. Keyboard (the Keyboard section is on page 45) g. Top cover (the Top cover section is on page 52) h. Battery (the Battery section is on page 66) i. Main board (the main board section is on page 74) (printed page 79).\n5. Place the main board upside-down. (printed page 79).\n6. Discrete models: Inside the order indicated on the heat sink, back off the 6 captive Phillips fasteners (1)–(6) that hold the heat sink to the main board. (printed page 79).\n7. Lift the heat sink from the main board (7). (printed page 80).\n8. UMA models: Inside the order indicated on the heat sink, back off the 4 captive Phillips fasteners (1)–(4) that hold the heat sink to the main board. (printed page 80).\n9. Lift the heat sink from the main board (5). (printed page 81).\n10. Fit the replacement part by working back through the printed removal steps (printed page 81).\n\n",
 "outcome": "found",
 "data_revision": "93b6f8041cad",
 "license": "Free to use with attribution: credit \"Laptop Part Finder\" and link to https://laptoppartfinder.com (or the page you used). Please do not republish or mirror the dataset in bulk without permission.",
 "attribution": "Laptop Part Finder (https://laptoppartfinder.com)",
 "terms_url": "https://laptoppartfinder.com/terms/#data-license"
}