elitebook 845 g9 cold boot requires double pressing or long pressing the power button

[Lanterns]

elitebook 845 g9 after shutting down for a period of time (this is not the case just after the shutdown), you need to press the power button twice or long press the power button to turn it on. The same happens when the power adapter is plugged in or not.

[ub6424]

Hello @Lanterns 

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

I want the check your current system configuration.

(1) Run    msinfo32

- Select <System Summary>:

--->>> copy/paste to following key/value pairs:

OS Name

Version

System Model

System SKU ( equals HP product number (p/n) )

BIOS Version/Date

(2) Please report your results

[Lanterns]

thanks for your help, I will provide all useful information:

OS Name	Microsoft Windows 11 Pro for Workstations
Version	10.0.22000 Build 22000
System Model	HP EliteBook 845 14 inch G9 Notebook PC
System SKU	6K5C6PC#AB2
BIOS Version/Date	HP U82 Ver. 01.02.01, 2022/8/18

After this problem happened, I reinstalled my Windows, installed the latest bios, as you can see, the bios version was released on 8/18; the only thing my computer hardware is different from the factory is that I replaced the 32 *2 memory, but I don't think it's relevant to the problem.

[Lanterns]

I did a series of operations but I didn't solve the problem; I'd like to think it has something to do with a bug in the BIOS, because the last BIOS update solved another problem that bothered me, shutdown after sleep.

[ub6424]

Hello @Lanterns 

(1) Download and update

HP PC Hardware Diagnostics UEFI

8.5.0.0 Rev.A

61.7 MB

Jan 28, 2022

Download

(2) Test your hardware Using the HP PC Hardware Diagnostics (UEFI)

--->>> Perform <all> tests

https://support.hp.com/us-en/document/ish_2854458-2733239-16

See section <Running HP PC Hardware Diagnostics UEFI tests when Windows doesn't start>

See how it works:

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

(3) Please report your results ( error messages, take pictures )

[Lanterns]

Thanks for the guidance, here are my test results, the test results pass, but I don't know whether to be happy or sad because it won't fix anything:

Model: HP EliteBook 845 14 inch G9 Notebook PC
Serial Number: [Personal Information Removed]
Product ID: 6K5C6PC#AB2
CSO Number:
Agent ID:
================================================
Start Time Type Result Failure ID
------------------- ------------------ -------- ---------------------------
2022-09-04 20:15:56 System [E] Passed NA

<END>

[ub6424]

Hello @Lanterns 

(1) Power off computer

(2) Disconnect charger

(3) Press and hold <power> button for 30 seconds

(4) Connect charger

(5) Test <cold boot> again ...

(6) Please report your results

[Lanterns]

This still doesn't solve the problem.

[ub6424 · Accepted solution]

Hello @Lanterns 

Our possibilities are exhausted

HP warranty valid -> Contact HP Support for service repair

HP warranty expired:

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

Cheap alternative:

Live with the error

Good luck

[Lanterns]

Although the problem is not solved, thank you anyway.