The firmware file you download match your specific motherboard ID. If you download a file meant for a different board revision, the TV will not recognize it or could fail to turn on entirely.
The TCL L43S6500 is a 43-inch smart LED TV that runs on Roku TV, a popular streaming platform. Like any other smart device, the L43S6500 has firmware that controls its functionality and features. Firmware is essentially the software that is embedded in the TV's hardware, and it plays a crucial role in determining the device's performance, stability, and security. Firmware TCL L43S6500