The hardest faults to find are those that happen only Every so often—intermittent functions. They can be caused by bad connections, dust, Filth, corrosion or simply broken wiring or connectors.H?i ??ng x? s? ki?n thi?t mi?n B?c bao g?m 28 ??n v? thành viên, trong ?ó có 6 ??n v? t? ch?c quay s? chính th?c và c? ??nh hàng tu?n c? th? nh? sau