Cleaning the fan and replacing dry thermal paste cures laptop overheating and thermal throttling.
: Ensure the laptop is completely shut off and disconnected from any power source. Static Safety
Step 3 — Remove RAM and storage
| Symptom | Likely Cause | | :--- | :--- | | Laptop won't turn on after reassembly | Forgot to connect the power button ribbon cable. | | Fan runs constantly/loud | Heatsink not seated properly or missing thermal paste. | | Keyboard keys don't work | Keyboard ribbon cable not fully inserted or ZIF latch open. |
Flip the laptop over. Locate the battery release latch (usually a sliding switch with a lock icon). Slide the latch to unlock, and the battery should pop up or slide out. Why first? Removing the battery cuts power to the motherboard. While the power button is software-controlled, removing the battery is the only way to ensure no standby current is flowing when you touch the motherboard.
The keyboard must be unseated to access the upper chassis screws and motherboard cables hidden underneath.
: Remove the remaining bottom and top case screws to separate the upper and lower enclosures (U-case and L-case). Technical Resources iFixit Repair Guides
: To clean the fan or replace thermal paste, remove the screws securing the fan and the heatsink assembly over the CPU. Motherboard
Disassembling your laptop may void your warranty. Work on a static-free surface (like a wooden table) and consider using an anti-static wrist strap.
Slide the keyboard ribbon cable out and remove the keyboard. Step 4: Top Cover and Palm Rest Separation
To access the fan, heatsink, or motherboard, you must remove the keyboard and the top cover.
Cleaning the fan and replacing dry thermal paste cures laptop overheating and thermal throttling.
: Ensure the laptop is completely shut off and disconnected from any power source. Static Safety
Step 3 — Remove RAM and storage
| Symptom | Likely Cause | | :--- | :--- | | Laptop won't turn on after reassembly | Forgot to connect the power button ribbon cable. | | Fan runs constantly/loud | Heatsink not seated properly or missing thermal paste. | | Keyboard keys don't work | Keyboard ribbon cable not fully inserted or ZIF latch open. |
Flip the laptop over. Locate the battery release latch (usually a sliding switch with a lock icon). Slide the latch to unlock, and the battery should pop up or slide out. Why first? Removing the battery cuts power to the motherboard. While the power button is software-controlled, removing the battery is the only way to ensure no standby current is flowing when you touch the motherboard. hp probook 450 g0 disassembly
The keyboard must be unseated to access the upper chassis screws and motherboard cables hidden underneath.
: Remove the remaining bottom and top case screws to separate the upper and lower enclosures (U-case and L-case). Technical Resources iFixit Repair Guides Cleaning the fan and replacing dry thermal paste
: To clean the fan or replace thermal paste, remove the screws securing the fan and the heatsink assembly over the CPU. Motherboard
Disassembling your laptop may void your warranty. Work on a static-free surface (like a wooden table) and consider using an anti-static wrist strap. | | Fan runs constantly/loud | Heatsink not
Slide the keyboard ribbon cable out and remove the keyboard. Step 4: Top Cover and Palm Rest Separation
To access the fan, heatsink, or motherboard, you must remove the keyboard and the top cover.
