I have gone through your Post and would like to help
Please run an Audio Test from F2 Diagnostic and let me know if you hear the crackling sound
- Hold the power button for at least five seconds to turn off the Notebook.
- Turn on the computer and immediately press Esc repeatedly, about once every second.
- When the menu appears, press the F2 key.
- On the main menu, click Component Tests and Audio
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