tsx080

i have a floureon 4 channel system, it came with 2 cameras i believe they are tvl 1500. the first camera failed after about 2 weeks and i replaced it. now the second camera has failed after just over a month. i have included a pic showing what i can see can anyone help me identify why the cameras failed so quickly

im from the uk, what would be the best brand ahd camera to get in future?

Thanks for the advice on the cameras I was wondering about the 2mp ones as they are only slightly more expensive. Before I get the more expensive cams I was hoping to identify what might be causing them to fail incase it's an environmental issue as I dont want to be replacing cams all the time. As I said in my previous post tho I'm hopeful this was just a bad batch of cams. Unfortunately the system was purchased over a year ago and had been sat on a shelf until a recent bout of vandalism prompted me to get it setup, so my only option was to purchase new cams as returning is no longer possible

I didnt try changing the format as the camera had until yesterday been working. It's been working perfectly for almost 5 weeks before it started to flicker and show up with that image. Its powered by the 4 way power plug that came with the unit. It's on a 20 meter cable. I have tried having just one camera plugged in to see if the power supply was insufficient with no change. I replaced the first camera about 3 days ago and so far that one is working perfectly. I have ordered another camera as hopefully I was just unlucky and maybe had 2 cams from a bad batch.

the camera is an ahd 1500TVL and it flickers between a garbled image as shown and a normal image. the problem seems worst in the daytime so i was wondering if the image sensors could be faulty of have burned out?