: Unplug the TV again, wait a few minutes, remove the USB drive, and then power the TV back on. Important Precautions
The is a widely used mainboard (chassis) for Telefunken 4K Ultra HD TVs with a display resolution of 3840x2160 . Firmware for this board is typically distributed as a USB-installable package named allupgrade_5522_8G_1G_ref56.pkg . Because these files are often split into multiple compressed parts (such as a "part12.rar") for easier sharing, they must be fully downloaded and recombined before use. Supported Telefunken Models
: Firmware is unique to the TV's specific panel model. Installing the wrong version can cause display issues like inverted colors or an upside-down image. Download MT5522S PC822 3840x2160 Telefunken part12 rar
This specific mainboard and firmware configuration are commonly found in the following models: TF-LED50S50T2SU : Utilizing panel T500QVN03.7. TF-LED55S17T2SU : Utilizing panel HV550QUB-N5L. TF-LED55S15T2SU : Utilizing panel T550QVN05.6. TF-LED50S84T2SU : Utilizing panel CV500U1-T01-V01. How to Install MT5522S PC822 Firmware
: Use a tool like WinRAR or 7-Zip to extract "part1" of the archive. This will automatically pull data from all other parts (including part12) to recreate the full firmware file. : Unplug the TV again, wait a few
: Always seek official or highly reputable repair forums like KenotronTV to ensure you are downloading verified files for your specific serial number.
: Never turn off the TV during the flashing process, as this can lead to a permanent "brick" state where the TV will no longer boot. Because these files are often split into multiple
A flashing indicator light (often red) signals the update has started. Wait until the indicator flashes rapidly or changes color (e.g., red-to-green), indicating completion.