: You must have every part (Part 1 through Part 10) in the same folder on your computer.

Press and on the TV (not the remote) while plugging it back into the power source.

: Firmware for this board is often large and split into multiple parts (e.g., part1 to part10) for easier uploading/downloading on specialized technician forums like Receiver Pro or KenotronTV . How to Use the Part10.rar File

The file is one segment of a multi-part archive containing the USB firmware (software) for Telefunken 4K UHD Smart TVs using the TP.MT5522S.PC822

Do you have the (e.g., TF-LED55S17T2SU) from the back of your TV to confirm this firmware is compatible?

: Using the wrong firmware can permanently "brick" your TV. Double-check that your TV's mainboard model is exactly TP.MT5522S.PC822 and matches your screen panel type before proceeding.