Reliability issues

I have been having a number of hardware and software issues. I’ve always had problems with getting GPS to work and keeping it working. (I was using a Vernier sensor but I own and have tried others as well.) Recently I have had false/noisy signals from a Lego ultrasonic sensor, poor response from a HighTechnic color sensor (for some colors), and my Microsoft Surface Pro 4 keeps freezing up. My programs sometimes seem to lose contact with both a motor and light sensor. In some cases unplugging and replugging wires seems to fix the issue. I’ll try to fix these issues on the teststand. As with any experiment its hard to get everything working at once.