Here's a step-by-step tutorial on how to replace the CPU cooling fan in a HP EliteDesk or ProDesk using compatible fan models like:
✅Part Number: L19561-001 L19564-001
✅Model: 0FL3B0000H BAZA0813R2U P002
🔧 How to Replace the CPU Fan in HP EliteDesk, ProDesk (800 G4 800 G5 705 G4 705 G5, 400 G4 400 G5 405 G4 405 G5,600 G4 600 G5)
⚠️ Disclaimer
This process involves disassembling your Laptop. Doing so may void the warranty. Proceed only if you're comfortable with delicate electronics and static safety.
🧰 Tools and Materials Needed
Phillips screwdriver (size PH0 or PH1)
Plastic spudger (optional but helpful)
Thermal paste (new)
Isopropyl alcohol & lint-free cloth
Replacement fan: L19561-001 L19564-001 0FL3B0000H BAZA0813R2U P002
Anti-static wrist strap (recommended)
🔌 1. Power Off and Unplug
Shut down the Laptop completely.
Unplug the power adapter and all connected cables.
Press and hold the power button for a few seconds to discharge remaining power.
📦 2. Remove the Bottom Cover
Turn the Laptop upside down.
Use a Phillips screwdriver to remove the four screws from the bottom.
Carefully lift off the bottom cover.
💽 3. Remove the SSD and RAM (Optional but Safer)
If needed, remove the M.2 SSD and RAM to prevent damage.
Set them aside in anti-static packaging or on a clean surface.
🧱 4. Remove the Mainboard
Disconnect all internal cables (fan, front panel, etc.).
Unscrew the board mounting screws.
Gently slide or lift the motherboard out of the case. Be careful of connectors underneath.
❄️ 5. Locate and Remove the CPU Fan
The fan is mounted on top of the heatsink.
Disconnect the fan cable from the motherboard.
Remove the screws holding the fan in place.
Carefully lift the fan off.
🧼 6. Clean the Heatsink and CPU
Remove any old thermal paste from the CPU and heatsink using isopropyl alcohol and a lint-free cloth.
Let everything dry.
🔁 7. Install the New Fan
Place the new fan on the heatsink.
Align screw holes and secure it with screws.
Reconnect the fan cable to the motherboard.
Apply a small amount (pea-sized) of new thermal paste to the CPU.
🧩 8. Reassemble the Laptop
Carefully place the motherboard back into the chassis.
Reconnect internal cables.
Reinstall the SSD and RAM if you removed them.
Close the case and screw the bottom cover back on.
⚙️ 9. Test the System
Plug in the power and boot the Laptop.
Enter the BIOS to verify that the fan is detected and spinning.
Monitor CPU temperatures using software like HWMonitor or Intel Power Gadget.
🎉 Done!
You’ve successfully replaced the CPU fan in your HP EliteDesk or ProDesk. Your system should now run cooler and quieter.