Good afternoon forum I write for the following, about 10 months ago make a installation of 4 cameras in a customer all excellent, spent 8 months and added a camera but changing the dvr from 4 ch to an 8ch dvr. recently the light was cut off and when he returned he began to see with stripes in the 5 cameras. I will solve the problem by pointing to the source the whole system was fed x a source of 12V 5A, the thing is q change the source and nothing all the same m volvi loko switch baluns, dvr, source and nothing. I describe the installation are 3 cameras with separate wiring and 2 q share the same cable utp. the situation is probe q a dvr of 4 ch and it looked the same, but to tenaparecer the rays tube q put 2 more sources (the 2 cameras that share the cable I put a source other than 12V5A will have a distance of 35m) dsp to another camera of 25 I put another source of 12V4A, and another dsp to 5m another 12V5A source. it is rare that an installation takes me so much food there is something that is consuming everything and I can not find out what it is, what next is left is to wire everything again. clarifying something important the cameras placing them independently are perfect now when I start adding cameras to the same source the stripes start. if they could help me I thank them I'm becoming loko I always touch these things insolitas and is a pity pq I was wrong in front of the clients to go several times in a row. 1-dvr dahua 4 ch 4104 (HD-CVI) 5-cameras common HD-CVI many thanks!!!

Thank you very much for the help, I never found the precise problem but the solution was to put individual sources for each camera, pq if you shared the source distortion began, I calculate the noise was brought by two cameras that are near the post with the power input, but good already is solved. thank you very much regards