Tried different inputs in DVR, also different coax. Did not help unfortunately 
  
 
  
The cameras worked before when they were used for someone else´s system, but not with my DVR and current configuration that I have inputed. 
  
I know the cameras are old, would love to buy something newer but way to expensive for me unfortunately. I did however change to another monitor with correct ratio (old computer monitor for servers), but didnt help.  
  
In the DVR I tried to find display settings, but only found recording settings, that I changed to EXB (EXA/EXB: Low quality (EXTENDED)) AND 3IPS.  
  
Also I cant seem to find region anywhere in its menu. Also tried looking for it in the manual with no luck :/