: Continue holding for about 10–15 seconds until you see an "Upgrading" or "System Updating" progress bar on the screen, then release. Method B: The Settings Menu Method
: A standard USB 2.0 or 3.0 drive with at least 2GB of space is usually sufficient. TCL Support recommends a drive with a speed of at least 8 Mbps to ensure smooth data transfer. Tcl Software Update Usb
: The USB drive must be formatted to FAT32 . Using other formats like NTFS or exFAT may result in the TV not recognizing the drive. : Continue holding for about 10–15 seconds until