Hi ,
That seems to be the lcd connection.On the first page from this topic under the tittle dataloging ,Thanos show how the data come from the amc1.6 with the terminal application.
You can download this application on first page terminal2113 zip connect your board and test if the communication is good.
parameters 115200 , 8bit ,no parity ,no check (i don't remember exactly).
If the communication is OK that should be the lcd,connection.
There is a jumper near the pot for yhe lcd contrast did you sold it ?
And what a profesional PCB !!
Very good !
Regards
Look at th picture.If the holes are not metalized I think you have to sold a thread between the 2 face of the pcb.