F12E Parts - the Video transmission does not work

In my F12E dissapears a SMD part and this causes no Video Signal on the screen. It's a small part on the board on which the video reciever and the transmitter is plugged in.

Can anyone tell me tell me where to buy such a board. I didn't find any Walkera Service or Devention service .. The Walkera homepage is .. How should I say not very helpful.

Thanks for your help.

If anyone is interested how I will solve this little problem i will write a smal history ...