Technicians often provide "tested" software links in the descriptions of repair tutorials on YouTube for fixing boot-loop issues.
The file refers to firmware for the TP.SK708D.PC821 Go to product viewer dialog for this item. Download SK708D PC821 3840X2160 REF52 part01 rar
If you need the physical hardware, the board is available through retailers like AliExpress and Alibaba . Technical Specifications Technicians often provide "tested" software links in the