Inspiron 15 3520, warranty issue USA to India

I bought a Dell Inspiron 15 3520 laptop from US and it has US based Warranty for 1 year but right now I'm using product in india since 8 months their no issue before. Recently got an issue with hinge cover, So i approached to near by dell service centre they informed that, Sir not only one laptop they are so many laptop from Dell Inspiron got the same hinge cover issues. 

they just suugest me to convert the warranty from US based to india and let them know then they will start working on it so i just need the step by step process to convert the warranty 

I hope you will sought out this issue ASAP....!  

Thank You .