How do I replace the plastic panel behind the display

Hi,

Here’s the ifixit Asus X751L Screen Replacement guide.

This will help you to gain access to the LCD cover.

Here’s a link to a supplier of Asus parts. Find and click on your exact model number and then under Product Category select Covers when the component options appear, to find the Asus part number for the LCD cover.

Once you have the part number, search online using the part number only in the search box of your browser, to find suppliers that suit you. Usually the part number is printed on the cover itself somewhere on the inside, if you wish to verify that you are ordering the correct part