benh nay kiem tra chan ket noi man hinh.vi cac loai may 1110i1202,1108,1600,vv.khi bo man hinh ra thi khi bat nguon no dao dong 0.5mhA rui lai ve.lan sau gap truong hop nhu vay nua thi ban nen kiem tra mh va duong mach mh nhe.kiem tra ki moi dong vao ic.