Do not use random Google Drive links from forums. Use these official sources:
Now for the main event. You have two methods depending on whether your TV turns on normally or is bricked. Tcl Software Update Usb
At its core, the Tcl Software Update USB method is a manual installation process. Instead of pulling firmware directly from Tcl’s servers via an internet connection, the user downloads the firmware file (typically ending in .bin , .img , or .pkg ) onto a computer, transfers it to a USB flash drive, and inserts it into the television. Do not use random Google Drive links from forums