This specific issue can be hardware-related rather than a firmware problem. One technician reported a case where the screen would go black after 10-12 minutes of normal operation while the audio continued to play.
The downloaded firmware file must be placed in the root directory of the USB drive. Do not place it inside any folders or subdirectories.
Introduce new system capabilities or support for updated app versions.
: Power off the TV and insert the USB drive into the TV's USB port. Initiate Flash :
These are .pkg files used for clean, low-level system installations. They are required if your TV is stuck on the TCL boot logo, experiencing a boot loop, or failing to launch the Android operating system. Prerequisites Before Updating
Official firmware for the S6500 series often follows a "Vxxx" naming convention. Key identified versions include: Version V503 : Associated with the MT15 chassis Version V575 : Associated with the MT58 chassis ; it is often distributed as a direct Platform R51 AT01