[Xin giúp] mxbox dung binh thuong update len ban 3.5rev2.5 khong búcheck duoc

[ngotutrong]

minh dang dung ban mxbox ver 3.5 rev2.2 minh update len 3.5rev2.5,thi tu lơn dung bõ khong the bus check duoc,va box bao erro bad contac tx line remain lown