Imaging Problems (horizontal lines)

Good afternoon, I'm new to this forum and I come to you with a problem (and hopefully solve yours too!)

After making the installation consists of a Dahua DVR 4 Channel 4 cameras and Dahua fw450dp ca-me-go-0600b have a problem of rising horizontal lines on the screen. The funny thing is that he does not at any time or to a given cycle, but randomly, but I think is a bit more frequent at night.

The chambers 1,2 and 3 are connected to the same UTP cable what video signal, and the other goes UTP feeding. The 4th camera is connected with a UTP cable and the same will feed signal (in this camera is not as noticeable fault).

Among the evidence did was:

- Switching power supply

- Change baluns.

- Exchange of input channels DVR.

- Collation of 12v battery.

- Grounding.

Well, that would be more or less the picture, I hope any comment or criticism and attached an image capture.

From already thank you very much!