The toughest faults to discover are those who come about only once in a while—intermittent occasions. They may be because of undesirable connections, dust, dirt, corrosion or simply broken wiring or connectors.B??c two: M? ph?n “Ti?n ích” trong “Cài ??t Apple iphone” ho?c Ipad, tùy theo thi?t b? b?n s? d?ng.V?i t? l? th?ng c?c k? t??i