The product was partially faulty
I bought a replacement screen for my dughter's school laptop which display worked fine but touch functionality did not work at all. I still gave 2 stars because the seller wanted to help and asked me to send back for further investigation. But the problem was, this will again cost me another postage money, most importantly may take another month of waiting when my daughter needs it for school asap. So, I decided to use the laptop with this fault for now and buy another laptop this Christmas.