DC power supply board for TV screen

Hello, I need to install a TV screen in a van. This screen (SAMSUNG UE32C6000) is normally powered by AC 100-240 V at 50-60Hz. In my case I have only DC 12V available on board. There is a LED backlignt which request a high voltage / frequency I think. I would like to replace the original "power supply" board installed at the back of the screen by a new one which can be powered by 12V DC directly. I have no idea if this is possible, or if we can modify some elements of the original board. The new board should fit at the same position as the original one, with roughly the same dimensions because I don't have a lot of room around. I join a picture of the original power supply board (other pictures of detail and overview) are available if necessary. I hope these information are sufficient and clear enough for you to understand my request. I'm of course available for more details if necessary but I'm not an electronician... sorry. (I'm a mechanical engineer). I would like to get all the engineering files + 1 electronic board ready to install with the same connectors as the original (if possible) to be able to plug the other boards as original. Thanks,