txcctv

Hello everyone. I'm relieved to have found this forum, as I've been searching high and low for help with my system, hopefully one of you can help me out. I recently purchased a business that has 8 cameras and a dedicated DVR and power supply for all of them. Pictures of the system can be found here: http://imgur.com/a/IJAoH 1 (channel 1) of the 8 cameras is displaying a blue screen that says "video loss". I also noted that the LEDs on the camera that I'm having problems with, channel 1, are not lighting up, like all of the other cameras. Today I tried to trouble shoot it by doing the following: --1: I switched the cameras from channel 1 and channel 2. The camera from channel 1 worked when it was plugged in at the channel 2 location without any problems, the LEDs turned on as well. The camera that was at channel 2 did NOT work (nor did the LEDs turn on) when it was plugged in to the channel 1 location. --2: I went to the power supply, I switched the power leads from camera 1 to 2 and from 2 to 1. This did nothing to improve my situation, just like above. --3: On the back of the DVR, I switched the BNC connectors to see if I could get a signal in a different port on the back, to no avail. The other BNC connectors/cameras worked in channel 1, but channel 1 would not work in any of the other ports. --4: I checked the power output at the power supply and each output is giving me 12V. --5: I checked the power input at the cameras of channel 1 and channel 2. Both of them are getting 12V. --6: I wiggled the BNC connectors at the camera and at the DVR. The screen is still blue and displaying "video loss" on channel 1, while the 7 other channels are working fine. With my limited knowledge (read absolutely no idea what I'm doing here) I would assume that there is something wrong with the video cable somewhere, but like I said, I have no idea what I'm doing here. The power seems fine at location 1, but the LEDs don't come on and this doesn't make sense to me. Does the the video cable connection have anything to do with turning on the LEDs? The camera that I'm having problems with *is* the furthest away from the DVR and power system, I'm not sure if that has anything to do with it? I don't know the distance at this point, I'd have to wait until tomorrow to estimate it for you guys. Do any of you have any thoughts on what I can do to fix this? Thanks so much for your help in advance.

Hey do I was able to run through the first suggestion you had. It still didn't work. I unplugged all power leads from the power supply then plugged each one back in with only one at a time. Every camera worked but that blasted camera 1. I walked off the distance, so I'm thinking we are at roughly 120' give or take some depending on how the cable was run in ceiling. I don't have an individual power supply to plug in somewhere and try the camera. Do you guys know where I could find one for that for my camera specifically? I spoke with one of the employees that has been there since the cameras were initially installed. She said it worked for "a while" then never worked again. Why they didn't address it years ago is beyond me. Now I'm here to pick up the pieces. How would I tell how many watts the camera uses? Thanks again! The cablrs sheathing has the follwing printed on it: CCTV combo RG59/U white 95% copper (along with a lot number and the #of feet.