The toughest faults to seek out are the ones that occur only Occasionally—intermittent activities. They are often because of poor connections, dust, Grime, corrosion or simply damaged wiring or connectors.B??c 3. ??i th?i gian ng?n ?ng d?ng hoàn t?t t?i xu?ng anh em ch?n cài ??t vào thi?t b?. ??ng th?i xác minh m?c ?? “tin c?y” hay không