11. – 22. March 2026
: Verify the filename matches what is expected for your board; some versions require renaming the file to allupgrade_5522_sos.pkg to trigger a recovery. 3. Installation Procedure
: Plug the prepared flash drive into the USB 1 port on the TV. Trigger Update : Press and hold the Power button on the TV (not the remote). Download MT5522S PC822 3840x2160 Telefunken part04 rar
Right-click on ( part01.rar ) using a tool like WinRAR or 7-Zip . : Verify the filename matches what is expected
Large firmware files are often split into multiple parts (e.g., part01.rar through part04.rar ). Trigger Update : Press and hold the Power
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
While holding the button, plug the TV back into the power outlet.