Loud "MOTORBIKE" quality noise coming from laptop speakers

I have a very loud and constant noise coming from my HP Pavilion DV9520TX Laptop speakers. It is intractable, and is not buzzing or squealing, but almost motorbike like in quality, waxing and waning. It begins as soon as the computer has started up, does not alter with changing of the volume levels, and only stops when I either mute the computer, or disable/uninstall the realtek audio device driver. It started all of a sudden, for no reason, i was not even using the computer at the time. Plugging speakers or headphones in does not change the noise, it still comes out the internal speakers.

I am thinking its something to do with my motherboard not being grounded anymore and some sort of interference?

Anyone have ANY idea about this, or has anyone had a similar problem and fixed it.

Would very much appreciate any help!