The firmware you are looking for is specific to the (also known as TP.SIS231.P83
To help you find the exact file, could you check the inside the TV for the Panel Model Number (e.g., V320BJ3)? Also, is the TV currently stuck on a boot logo or a black screen ? Download SIS231 P83 FITCO FLED FHD Mirror Firmware USB rar
Press and hold the on the TV panel (not the remote) and plug in the power cord. The firmware you are looking for is specific
Firmware for these boards is usually distributed as a .rar file containing a .bin or .img file. Format a USB drive (8GB or less recommended) to FAT32 . Extract the .bin file from your downloaded archive. Download SIS231 P83 FITCO FLED FHD Mirror Firmware USB rar