@shaikmohammed you are not giving us much to work with here. We need to know what exact make and model your monitor is. Then we need to know more about these lines. Are they horizontal or vertical? Are they wide or narrow? Did anything happen to this monitor prior to the line showing up? What have you checked? What have you tried? Once you've answered those points, take some pictures of what your screen shows and post those with your Question. That way we can see what you see.
more info is needed
by bill
@shaikmohammed you are not giving us much to work with here. We need to know what exact make and model your monitor is. Then we need to know more about these lines. Are they horizontal or vertical? Are they wide or narrow? Did anything happen to this monitor prior to the line showing up? What have you checked? What have you tried? Once you've answered those points, take some pictures of what your screen shows and post those with your Question. That way we can see what you see.
Adding images to an existing question
by oldturkey03