If your TV is still functional enough to access the boot sequence, you can attempt a local update: to FAT32.
: Unpack the .rar file and copy the .bin or Update.img file to the root directory of the USB drive. Initiate Update : Power off the TV and insert the USB drive.
While holding the button, plug the TV back in or power it on. Continue holding for about until the upgrade screen appears. The process takes approximately 4 minutes to complete. Official Support Channels Download FLASH DUMP TCL L40D2900 rar
These files are frequently hosted on technician forums and community channels such as lcd tv led tv smart tv software .
Public archives have cataloged specific dump files for this model and its chassis (TP.MS1306.PB775): If your TV is still functional enough to
(2.3 MB) — Firmware specifically matched to the TP.MS1306.PB775 board.
(2.3 MB) — Standard flash dump for the L40D2900 model. While holding the button, plug the TV back in or power it on
— Often used for cross-compatible chassis versions.