Downloading and installing requires a bit of research and patience, but the rewards are substantial—improved performance, new features, security updates, and often better picture and audio quality.
Release the button and allow the process to finish. The TV will reboot automatically when complete. Execution Process for TCL Roku TV Download Tcl Firmware For All Models
AVS Forum has dedicated threads for TCL owners, including detailed . Downloading and installing requires a bit of research
Usually a .zip file. Used for standard updates through the menu. It does not delete your apps or data. but the rewards are substantial—improved performance
I will help you locate the correct download link.
XDA Developers TCL Forum (Trusted for custom or older stock firmware)