I'm having issues when I connect 6820/EVS board from 6820 FACP to 6820EVS FACP,

I have and old 6820 but the main board is working well, so I want to move to a 6820EVS with the main board burned. I checked it and both main boards looks equals but when I made the movement the display always show the same message to the picture and not initialized.
I already update the main board to the version but nothing change. I hope some of you could help me with that issue.
Thanks in advance