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Monitor on AIO HP Envy 340 - black out and comes back in a few secunds

HP Recommended
HP envy 340
Microsoft Windows 10 (64-bit)

My monitor suddenly black out for a few second, and comes back agein - its almost like there is a cabel that is not connecte securly - but this ALL-IN- ONE computer so no cables. 




Any ide what to do?

HP Support Agent
HP Support Agent
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Message 2 of 2
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HP Recommended

@ArvidHT Welcome to HP Community!


I understand that the Monitor on AIO HP Envy 340 - blackout and comes back in a few seconds.


Do not worry. I will try to fix the issue.


Please attempt the below steps: 


Attempt a BIOS recovery > All in one 


If the above steps work and the display turns on: Perform a hardware test to be on a safer side. 


If the steps didn't work, use the below links for further assistance: 


Computer Starts but Monitor/Screen Remains Blank  : Click here 


HP and Compaq All-in-One and HP Touch Smart Desktop PCs - Screen is Blank after Starting the Computer: Click here 


Keep us posted,

If you would like to thank us for our efforts to help you, 

Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post, 

Have a great day!

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