Large firmware files are often split into multiple parts (e.g., part01.rar through part04.rar ).
: The standby LED should begin flashing (often red/green or fast red), indicating the update is in progress. Download MT5522S PC822 3840x2160 Telefunken part04 rar
: Once the LED flashes rapidly or stops, unplug the TV, remove the USB drive, and wait two minutes before powering it back on. Large firmware files are often split into multiple parts (e
: Ensure you have downloaded all parts of the archive. The extraction will fail if any part, such as part04.rar , is missing. unplug the TV
Right-click on ( part01.rar ) using a tool like WinRAR or 7-Zip .