Thanks for engaging in HP support Forums! This is a wonderful location to converse with the community, get assistance and find tips! I understand you are having issues with the crackling noise coming from the Left speakers. Don't worry we'll work together to help you with this.
Splendid effort and fabulous description of the issue before posting. Kudos to you on that score. You are a valued HP customer and it is paramount to assist you here. I take it as a privilege to share this platform with you.
To provide you with an accurate solution, I'll need a few more details:
Have you recently made any changes on the PC before the issue started?
Have you checked if the noise is audible when connected to a headphone
Have you tried to update the Bios?
Have you tried to update the drivers either using Windows update or using HP Support Assistant?
Have you tried to run any test on Audio from F2?
In the meantime, let's try these steps here:
Let's start off by updating the Bios, Chipset and Audio drivers on your PC from our HP support website, using this link.
Also, download and install HP support assistant on your PC. It should automatically download and install the latest updates and drivers for your PC.
Refer this link to know how to use HP support assistant.
Once done, restart the computer and check for the crackling noise.
Alternatively, you can connect a Headphone and check for the crackling noise coming from the right speakers.