: Move the extracted firmware file (e.g., allupgrade_5522_8G_1G_ref56.pkg ) directly to the root of the USB drive. Do not put it inside any folders.
: 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.g., part01.rar through part04.rar ). Download MT5522S PC822 3840x2160 Telefunken part04 rar
: Use a high-quality USB flash drive and format it to FAT32 .
Select . The software will automatically pull data from all other parts (including part04 ) to create a single usable file, typically ending in .pkg or .bin . 2. Prepare the USB Drive : Move the extracted firmware file (e
Follow these steps to update the board via USB: Power Down : Unplug the TV from the wall outlet.
While holding the button, plug the TV back into the power outlet. Large firmware files are often split into multiple parts (e
Downloading and installing multi-part firmware for the (3840x2160) requires careful preparation, as using the wrong firmware version for your specific panel can permanently damage your TV. 1. Download & Prepare Firmware Files