If your TV is stuck on the logo or you have a manual update file, follow these steps: How can I update the software of the TV? - TCL
: The most reliable way to get an official Update.img or SW BIN file is to Contact the TCL after-sales team . Download TCL 24T3520 Software rar
: Technical forums like Dr-Bios or Forum-Monitor host community-uploaded firmware archives (.rar) for technicians. If your TV is stuck on the logo