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HP Recommended
HP ENVY Curved All-in-One - 34-b100na
Microsoft Windows 11

basically my external monitor is not receiving any signal from my HP Envy desktop.

the monitor works fine and the hdmi cable as well as I tested both on my laptop and the screen was fine.

is there a way to test the graphics card external signal to see if it is working fine?

so not sure if the graphics card is faulty or if there is an issue with the latest windos 11 updates.


any help is very much appreciated

HP Recommended

Hello @tolenuk 

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


Let me check your current system configuration.


(1) Run    msinfo32

- Select <System Summary>:

--->>> Copy/screenshot/paste following key/value pairs:


OS Name


System Model

System SKU

( equals HP product number (p/n) )


BIOS Version/Date


(2) Start Windows <Device Manager>

- Expand <Display adapters>

- Expand <Monitors>

- Expand <Sound, video and game controllers>

--->>> Send screenshot


(3Please report your results

HP Recommended



HP Recommended

Hello @tolenuk 


(1) Create Windows system <restore point>

How to Create a System Restore Point on Windows 10 or Windows 11


(2Download and install BIOS Update

HP Consumer Desktop PC BIOS Update

F.85 Rev.A11.2 MBJul 20, 2022Download


Why should you install the update ?


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.




(4Let BIOS be installed until it's completely done !


(5Download and install from Microsoft Apps Store

HP PC Hardware Diagnostics Windows


HP PC Hardware Diagnostics Windows v1.8.2.0


(6) Run <HP Diagnostics for Windows>

- Perform <all> tests


(7Please report your results ( error messages, take screenshots )

( if serial number, device id, UUID, System Board CT Number is displayed, please blur )

HP Recommended








 Thanks @ub6424 for your help.

the audio playback failed test is from the external monitor.

that monitor only connects during start up and during the BIOS update, but once windows starts..the other screen goes dark.. (no signal)




HP Recommended

Hello @tolenuk 

Thanks for testing.


You are using Windows 1122H2, did the external monitor work with Windows 1121H2 before?

HP Recommended

the monitor was working before I went on holiday 3 weeks ago. when I come back my PC done some updates automaticaly and the external monitor started flicking on and off after that... and now stopped completely. so I guess it was all ok before the update.

When I start my PC... screen comes alive and shows the HP logo as normal but once windows is loaded is just goes dark. no signal.

HP Recommended

Hello @tolenuk 


Please check Windows Update history and downgrade to Windows 11 21H2


(1In most cases, the simplest solution:

 => Use Windows Restore to return to the restore point (date) >>> before <<< Windows 11 22H2 was installed.



See section < How to undo changes using System Restore on Windows 11 >


(2Please report your results

HP Recommended

hi there,


it didnt work still have the same problem.



HP Recommended

Hello @tolenuk 


Please send screenshot of current Windows Update history.

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