Samsung Galaxy S4 Screen Replacement for I545/L720/R970 White with Frame-LCD Replacement for Samsung Galaxy S4 White for I545/L720/R970 with Frame-DWX Electronics New Original LCD Display Screen pre-assembled & Touch Screen for Samsung Galaxy S4 Comes with Full Set Free Tools Used for repair faulty screen, display problems, dead pixels, cracked LCD screens, wrong color issues. Easy install by following instructions step by step. 100% Inspected by professional QC team before shipping, 30-days return policy&warranty Trouble Shooting steps: Installation of the cable between the screen with the motherboard. The customer need to make sure the cable is connected in the right way tightly. Once the connection of the cable is loose, there will be some problem of the screen touch and display. For some customer the installation process may be hard thats why we have included the instruction in the package to help the customer to install the screen step by step. And the customer could also search on the internet (ie, YouTube etc.) to find a installation video to fix the screen