Lamp Troubleshooting

import java.util.*;
public class Lamp
{
    public static void main(String[] args){
        System.out.println("Does the lamp work? Yes or No?");
        Scanner input = new Scanner(System.in);
        String answer = input.nextLine();
        if (!answer.equalsIgnoreCase("yes")){
            System.out.println("Is the lamp plugged in?");
            answer = input.nextLine();
            if (!answer.equalsIgnoreCase("yes")){
                System.out.println("Plug in your lamp.");
            }
            else{
                System.out.println("Is the bulb burned out?");
                answer = input.nextLine();
                if (!answer.equalsIgnoreCase("no")){
                    System.out.println("Please replace the bulb.");
                }
                else{
                    System.out.println("Please get your lamp repaired.");
                }
            }
        }
        else{
            System.out.println("Your lamp isn't broken!");
        }
    }
}