technosoft

I have newly started business as CCTV Camera System integrator. I have installed 28 cameras on 32 channel DVR @ client Place. Now only 12 cameras are only showing video on TV out of 28 cameras. Other 16 cameras gets power & IR lights gets on in night mode. This problem hasn't solved by connecting video balloon also. Plz give solutions if anyone has. Plzzzzzzzzzzzzzz