: The USB drive must be formatted to FAT32 . Larger drives (typically over 32GB) may require third-party tools to format as FAT32, as Windows might default to exFAT or NTFS, which the TV may not recognize.
This is the standard approach for TVs that are currently functional and powered on. How To Get The 2025 TCL TV Update Right Now! Tcl Tv Software Update Usb
: Visit the official TCL Support site or contact their after-sales team to get the correct firmware specifically for your model's Hardware ID and Serial Number. : The USB drive must be formatted to FAT32
While holding the button, plug the TV back in. Continue holding until the LED light begins to blink or an "Upgrading" message appears on the screen. How To Get The 2025 TCL TV Update Right Now
: Use a UPS (Uninterruptible Power Supply) if possible; a power loss during a firmware update can permanently damage (brick) the TV. File Integrity
You cannot simply search for "TCL 55R635 update." You need the specific hardware version. Installing firmware meant for a different internal chipset (even on the same TV model) can permanently damage the motherboard.