Fan constantly runs when power is plugged in - HP ProBook 450 G8 Notebook

[Vishwa_Raju]

Have recently noticed that my laptop fan runs full speed when I plugin the charger and it works perfectly when charger is unplugged.

Tests done from my end.

1. Power Drain

2. Battery Calibration

3. Software Update

4. System Update

5. Tested with another charger

Please suggest what can be the issue.

[ub6424]

Hello @Vishwa_Raju 

(1) Install BIOS

HP BIOS and System Firmware (T70/T85/T87/T88/T89/T99)

01.09.01 Rev.A

111.0 MB

May 13, 2022

Download

Why ?

https://support.hp.com/us-en/document/ish_4123786-2338478-16

Quote: "

Updating the BIOS is recommended as standard maintenance of the computer. It can also help resolve the following issues:

• An available BIOS update resolves a specific issue or improves computer performance.
• The current BIOS does not support a hardware component or a Windows upgrade.
• HP Support recommends installing a specific BIOS update.

"

(2) Install Diagnostics UEFI Update

HP PC Hardware Diagnostics UEFI

8.4.1.0 Rev.A

61.4 MB

Nov 30, 2021

Download

(3) Check you notebook for hardware errors:

Using the HP PC Hardware Diagnostics (UEFI) to diagnose hardware errors ...

https://support.hp.com/id-en/document/c04499777

Watch how it works:

https://www.youtube.com/watch?v=14GKIpGPNRM&ab_channel=HPSupport

(4) Enter BIOS and look for a System Configuration Option: Fan Always On <Enabled> and set to <Disabled>

See also:

HP Notebook PCs - Fan is noisy and spins constantly (Windows)

https://support.hp.com/us-en/document/ish_3045299-2819686-16

(5) Reboot and test again ...

Please report your results

best regards

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[Vishwa_Raju]

Thanks your feedback but actually non of your suggestions worked for me.

[ub6424 · Accepted solution]

Hello @Vishwa_Raju 

Recommendation and solution:

In your case: Service is required !
- The computer should be disassembled and checked.
- Thermal paste for CPU GPU and bridges should be renewed
- The function of the fan(s) must be checked
- General cleaning ...

If you can't do that, you should have it serviced by a professional notebook (chip level) repair store.

best regards

---

Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and

make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️

Do this on the post I wrote that helped solve it.

Thank you very much

             ⌨️

[Vishwa_Raju]

Thanks I will take this to service center to check the issue.

[ub6424]

Hello @Vishwa_Raju 

It was a great pleasure to help you ✅

best regards