Hi Marcjr, I use the HP Universal Multiport for several HP notebooks. And the part works perfectly with all devices. Since it is labelled "Universal" it should also work with the HP Pavilion - 15-cs3976nz. I hope this answer helps. Greetings maniederer

Bought and unfortunately not able to run...

Yes, I can only confirm this. A standard USB driver is used here that is universally compatible. Therefore, this should not be a problem with the HP Pavilion.