If you are looking for the physical motherboard rather than just the software, you can find the TP.S512.PB83 on AliExpress or Amazon .
: Users generally report that this board is reliable and easy to install, but software corruption is a known issue for these types of generic "three-in-one" boards. Download S512 PB83 FITCO FLED32DN4 Backup rar
: It is specifically for the TP.S512.PB83 three-in-one motherboard, which handles power, LED driving, and TV control. If you are looking for the physical motherboard
: You typically need to extract the .bin file from the .rar archive, place it on a FAT32-formatted USB drive, and insert it into the TV's USB port while holding the power button to initiate the "force flash" process. Where to Find Hardware which handles power