Finding a legitimate, virus-free "Schematics PDF Download" requires caution. Many websites claiming to offer free downloads are often clickbait farms or repositories for malware.
If you cannot find the PDF, purchase a "repair kit" or a used working board. Sellers often include a schematic or pinout diagram with the shipment. Search for Hannstar J MV-4 board on these platforms. Hannstar J Mv 4 94v-0 Schematics Pdf Download