When the laptop is turned off, a faint buzzing sound is heard

[SrdjanS]

When the laptop is turned off, a faint buzzing sound is heard. When i disconnect battery from motherboard buzzing goes away.

[ub6424]

Hello @SrdjanS 

Sorry to hear that you are having problems ... and I would like to help you.

Sorry to hear that you are having problems ... 

To help you I need to know the product number (p/n) of your notebook !

You will find this information on the back/rear of your notebook in small alphanumeric letters.

The product number (p/n) is legally allowed information about the computer. This is not sensitive data.

It is allowed to publish it in public.

or

press [windows key] + r

( run command )

msinfo32

copy / paste the System SKU value and BIOS Version/Date value

msinfo32

[SrdjanS]

Hello,

here is my product number: 336K7EA#UUW

[ub6424]

Hello @SrdjanS 

try ...

(1) Update BIOS

HP BIOS and System Firmware

01.09.10 Rev.A

62.4 MB

Jun 20, 2022

Download

Why should you install the update ?

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) Reboot

(3) Install/Update

HP PC Hardware Diagnostics UEFI

8.4.0.0 Rev.A

61.4 MB

Oct 29, 2021

Download

Intel Dynamic Tuning

8.7.10700.22502 Rev.A

7.3 MB

Oct 20, 2021

Download

Intel Management Engine Driver

2212.15.0.2669 Rev.A

275.3 MB

Apr 20, 2022

Download

(4) Test <all> hardware Using the HP PC Hardware Diagnostics (UEFI)

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

See how it works:

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

(5) Please report your results

[SrdjanS]

I did every step, everything is passed.

My Laptop works fine, i just can hear the beezing when laptop is turned off, and when laptop working sometimes i can hear weard sound for like a second and its stop.

[ub6424 · Accepted solution]

Hello @SrdjanS 

"Sounds" like a technical problem that is not detected by HP Diagnostics:

- mainboard battery charging logic

- bms (battery management system)

- battery

- Electrical interference

HP warranty valid -> Contact HP support

HP warranty expired -> Live with error

or

You should have it serviced by a professional notebook (chip level) repair store.