I am frustrated to the point of no return, I have assembled two 4.3 heater meters, and neither are working. I am not sure on how to trouble shoot it. I built one of the very first modles with not problems, but this one has got the best of me. when I start them up I get nothing but black blocks on the screen, I feel like I have checked all the connections with a volt meter and they appear to be getting the correct power, I downloaded the 4.3 snapshot and flashed it a couple of times and no change. anyone have any ideas on what to do other than start over again.