: Press and hold the physical Power button on the TV (not the remote) while plugging the TV back in. Continue holding for ~10 seconds until the "Upgrading" screen appears.
: Turn off the TV and unplug it from the power source. Download File TCL V386 (CHASSIS MS6586).7z
To install this firmware manually, you typically need a formatted USB flash drive and access to the TV's service settings. : Format a USB drive to FAT32 . : Press and hold the physical Power button