If you have extracted the firmware file (usually ending in .pkg ), the general manual update process for these TVs is as follows:
: Installing incorrect firmware can permanently damage ("brick") your TV. Always verify your specific model number (e.g., L48P1FS) matches the firmware version. For official assistance, you can contact the TCL Support Team or check their Software Upgrade page . Download MT56552 LF1V339 part01 rar
: Turn off the TV and insert the USB into the lower USB port. If you have extracted the firmware file (usually ending in
: Format a USB drive to FAT32 and place the firmware file in the root directory (do not rename it). Download MT56552 LF1V339 part01 rar
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