Yes, i disconnected all the Zorro cards, I get a white screen when they're removed.
Where are the vias located on the board?
the vias are all over the board. The ones you need to check, are the one surrounding the offended area ( vias are that little round silver like things .... they are like bridges that interconnects traces between the 2 faces of the PCB and can be affected/corroted by the acid)
