GuN18

Hy to everybody! I have this 300GB dedicated micros D4 unit,but and a problem too.. The problem is in that when I connect my cameras to DVR,the picture on monitor is very blind,and i see only white horizontal lines with shadows of objects that are in front of the camera... The cameras are ok,and i know that because when i connect them just on monitor without DVR,the picture on the monitor is excellent... Does someone had this problem or maybe a solution for this problem? Please help! Thanks!