Problem with the switch X1026 and CCTV system

Hi,

We have installed an X1026 switch without any special configuration with almost minimum changes as it comes from the factory for a CCTV system and it has been giving constant problems such as:
-Video with black image the camera responds ping but does not give an image
-Switch ports shut down completely does not give or POE or link
-With the restart the switch in previous times recovered, now I must give a factory reset to be restored

 I have tried to discriminate that the cameras with several tests and indeed the problem is not the cameras is the switch, among the tests I can mention.
-Electric feed POE with external injector, this to rule out that it is a problem of electrical power.
-Additionally I make a direct connection to my computer to a camera on the side of the switch I can see it without problem but I connect it to the switch and the image is lost.

I must add that there was a lapse in which all the cameras were working correctly and without making any changes the problem described
they help me to know if anyone has experienced a similar problem and how I solve it.

Thanks