: Use a tool like WinRAR or 7-Zip to extract the first part; it will automatically combine all parts into a single firmware file (usually named V8-S586T02-LF1V425.bin ).
: Format a USB flash drive to FAT32 and copy the .bin file to the root directory (not inside a folder). Local Update : Insert the USB into the TV. Download S586T02 LF1V425 part07 rar
: You can find official manuals and contact details for repairs on the TCL Support Page . : Use a tool like WinRAR or 7-Zip