Flashing this board is generally done via a USB stick. The .rar file must be extracted to reveal a .bin file (often named MS3663T_S.bin or similar). Use a USB 2.0 drive formatted to FAT32 .
Forums such as Remont-Aud or Elektrotanya are standard sources for specialized firmware "dumps" (binaries). Technical Deep Dive: The Flashing Process Download MS3663T PB757 1366x768 TELEFUNKEN rar
Place the extracted .bin file in the root directory (not inside any folder). Execute the Flash: Insert the USB into the powered-off TV. Flashing this board is generally done via a USB stick
Because these files are usually hosted on specialized technician forums or community repositories rather than official brand sites, you can typically find them on: Forums such as Remont-Aud or Elektrotanya are standard
Hold the power button on the TV (not the remote) and plug the power cord in.
Flashing Telefunken firmware might make your remote stop working if the TV was originally a different brand (like Erisson), as the IR codes differ.