for the 198 firmware if I search specific firmware forums.
the USB into your TV (use the USB 2.0 port if possible). Unplug the TV from power. Download S68AT02 LF1V198 part03 rar
the downloaded file (e.g., V8-S68AT02-LF1V198.bin ) directly to the root of the USB drive. for the 198 firmware if I search specific firmware forums
Firmware updates for TCL TVs with the V8-S68AT02 chipset are frequently hosted on tech support sites and forums dedicated to TV repair, such as . Download S68AT02 LF1V198 part03 rar
If you are looking for that specific version 198, I can help you:
Note: A similar, slightly older version (V8-S68AT02-LF1V182.bin) was previously provided officially by TCL Thailand on Dropbox for similar TV series. Download the .bin firmware file from a reputable source. Format a USB flash drive to FAT32 .