Keep holding the power button until the screen displays an "Upgrading", "Installing System Update", or blue progress screen.
Use a high-quality USB 2.0 or USB 3.0 flash drive with a capacity of 4GB to 32GB.
Copy the .zip file directly to the root directory of your FAT32-formatted USB drive (do not put it inside a folder). Do not extract it. Plug the USB drive into the USB port of your TCL L40S6500. firmware tcl l40s6500
on the TV (not the remote) while plugging the power cord back in.
Turn off the TV and unplug its power cord from the wall outlet. Insert the USB flash drive into the TV's USB port. Keep holding the power button until the screen
This indicates a corrupted software state. Perform Method 2 (Forced Recovery Flash) using a stable, official firmware version. This completely wipes the system partition and rewrites the OS. Performance Lags Right After Updating
Use this method if you have downloaded an incremental ZIP update file to your computer. Download the correct firmware .zip file for the L40S6500. Do not extract it
The TCL L40S6500 uses a proprietary firmware system, which is specific to TCL devices. The firmware version may vary depending on the region and country where the TV was purchased.
Advanced users can connect via ADB to remove unwanted pre-installed system apps to improve performance. 5. Verdict
The firmware version of the TCL L40S6500 is:
Android TV builds optimize cache files during the first few hours of use. If the lag persists, perform a factory reset via Settings > Device Preferences > Reset > Factory Data Reset to clear out conflicting leftover files from the previous OS version.