The toughest faults to find are those who come about only once in a while—intermittent occasions. They can be due to undesirable connections, dust, Grime, corrosion or simply broken wiring or connectors.Ca?ch ?ô?i ve? tru?ng th???ng x? s? mi?n Nam an toa?n nhâ?t chi?nh la? b?n hãy mang t?? ve? sô? ?o? ?ê?n t?i tru? s?? cu?a nha? ?a?i có ghi