I have received a couple of these boards with my Storm 250 Quad. Boards seem ok and well laid out, BUT they have a buzzer on this board that does a couple of functions, indicate low battery, and SOLID ANNOYING Tone for lost plane finder! I cannot get this stupid thing to disarm or shut off, and this is my last step before I cut the buzzers off the boards! I am using LibrePilot to program my Micro CC3D control board, radio control is with a Spectrum AR610 receiver. Matek board is connected to CC3D via jumper plug to Pin Set 5, 1 - 4 are connected to my EC motor controllers. Any Help much appreciated!