the physical Power button on the TV (usually located on the bottom or back panel). Plug the TV back in while still holding the Power button.
Official firmware for legacy models like the 29B330 is often not directly available on public consumer sites. Download Firmware TCL 29B330 USB rar
: Use a computer to format a USB flash drive (ideally 8GB or smaller) to the FAT32 file system. the physical Power button on the TV (usually
: The most reliable way to get the correct version is to contact TCL Support or their after-sales team with your serial number to receive a secure download link. Download Firmware TCL 29B330 USB rar