I have an MSI Leopard Pro (GP62MVR 6RF) gaming laptop that has recently started making this horrid grinding noise in the lower left hand side near one of the USB 3.0 ports and I have no idea why. It sounds like a dirty fan or an old HDD going bad, however there are only two fans inside which are at the top and I only have SSD's installed. I've taken it apart and cleaned it several times, as well as inspected it thoroughly in that area while inside it. There are absolutely no moving parts of any kind there and I'm at my wit's end with it. The only thing I've found that will make it stop (for an oh, so brief and heavenly silent few seconds) is to give it a good, solid rap with my knuckle right next to the USB. Please help. What on earth could be making this horrible noise?!