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New Envy 750 grounding issue

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HP Envy 750-417c
Microsoft Windows 10 (64-bit)

Bought this machine three weeks ago to replace an older PC.  It's used to run audio and video through a sound board.  The old one worked just fine.  The new PC introduces a horrendous amount of buzzing through the audio outputs.  There is crosstalk between inputs and outputs because if you put the output line to the input, you still hear faint audio and buzz through the board.  Other things running through the board, including other audio sources, run just fine and are quiet.  The output from the Envy is overcome with buzz.  Seems like it just has to be a wiring or grounding issue in the machine, but I was wondering if anyone has some possible answers.  We may just have to return the machine and get something different.  Thanks.

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Hi @BF5,


Thanks for engaging in HP support Forums! This is a wonderful location to converse with the community, get assistance and find tips! I came across your post and wanted to assist you. I understand you are having issues with the unusual sound coming from the PC. Don't worry we'll work together to help you find a solution.


To provide you with an accurate solution, I'll need a few more details:

Does the grounding sound come from the headphone as well?

Have you checked for any obstructions inside the PC?

Is it a grinding/rattling/vibrating/humming/high pitched sound you are hearing?


Have you tried to run a test on the computer?

Have you tried to update the Bios on your PC?


In the meantime, let's try these steps here:


Perform a Hard reset on the PC

Many startup errors and other problems can be resolved by decreasing the amount of power stored in hardware components. Decreasing stored power is sometimes referred to as a "Hard Reset". Use the following steps to perform a hard reset on a computer:

  1. If Windows is open, click Start and then Shutdown.

    If Windows is not open and the computer has power, press and hold the power button on the computer until the computer shuts off.

  2. With the power off, disconnect the power cord from the back of the computer.

  3. With the power off and the power cord disconnected, press the power button on the computer for 5 seconds. The power light indicator on or near the power button might turn on briefly but then go out.

  4. Reconnect the power cord and turn on the power.

Next thing, I would suggest here is to Run a System diagnostics test as well as an extensive test on the Hard drive from F2 (Please capture the failure ID for further assistance).


I would suggest please update the BIOS on your PC and check if it helps.


If the issue still persists it is a hardware issue, please contact HP support for service options.  


HP Technical Support can be reached by clicking on the following link:

(1) Once the support page opens please select the country in which you're located. Next, enter your HP model number on the right.

(2) Next, choose the 'Contact Support' tab at the top and scroll down to the bottom of the 'HP Support- Contact' page to fill out the form provided with your contact information.

(3) Once completed click the 'Show Options' icon on the bottom right.

(4) Lastly, scroll down to the bottom of the page and select 'Get the phone number.' A case number and phone number will now populate for you.


Hope this helps, for any further queries reply to the post and feel free to join us again

Feel free to post your query for any other assistance as well,

It's been a pleasure interacting with you and I hope you have a good day ahead.


If you wish to show appreciation for my efforts, mark my post as Accepted Solution.

And click on the Purple Thumbs up icon at the bottom of my comment.



I am an HP Employee

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None of this stuff worked.  We bought a focusrite audio interface to solve the problem.  There was no other way.  I tried an in-line buzz filter and with it connected to the computer output, the buzz was still there.  If I connected another filter to the input, the output buzz disappeared.  That means there is way too much cross-talk between outputs and inputs. Lots of hiss, though, and it reduces input volume.  It seems obvious that if HP wants people to be able to use this for any kind of pro audio, they're going to have to do some work to isolate the output and input and to properly ground the units.

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