I am not sure if I have a bad board. I have a raspberry PI Zero with a camera attached. It cannot reliably run more than 24 hours and I have never see it do 72 hours. I have a heat sink on it, I have taken the lid off so it gets a lot of air, and I am using a robust 2amp power supply. Am I using the wrong product to expect it to run continuously? Is it worth buying another PI Zero board?