Sadly your screen has failed. You likely sat something heavy on the lid or gave it a good bang along the edge. Here’s the guide [guide|27666] The hard part will be sourcing a display as you’ll only find recycled parts and Apple did have a run of displays with bad anti-reflective coatings which makes finding a good one hard and expensive! Here’s one [https://www.thebookyard.com/product.php?cPath=39_367_360&products_id=15444|13” MacBook Pro Display Assembly (L13/14), Apple P/N 661-8153]