sorry for my noobieness but im trying to connect 4 cameras a friend passed down to me, and im trying to set them up at my place, i pretty much have everything i need to have them up and running except for the power supply, which im unsure of which one they should run on, ive done a little research and i found out theres two types or atleast thats what i think, anyway i noticed these cameras have the same twist and lock video cord but the power end has a two way split that you can lock in with two little screws you can tighten into the cameras end, they also have the controls on the camera it self which you can control the focus, view, etc, its heavy and has many IR led's, i tried connecting it to a 12V 5A power supply but they show wavy lines on the monitor and my tv, and when i try connecting more than two they get worse and once i connect three, the third one turns on and off constantly, which makes me think they arent getting enough power, hopefully i can receive some help from anybody on here i would really appreciate it, thanks.
P.S. im going to provide a pic of one of the cameras maybe somebody can recognize them.