I have a lightly used EOS 80D purchased from Canon and no longer in warranty. I sent it for repair. The Lens pins and the corresponding Circuit board was replaced as a result of an error 01. This is my first DSLR to ever give out, in the many cameras I have worked with professionally. It locked up using my Canon lens after about 20 shots. Just prior I was using a Sigma 200-600 zoom which is quite heavy. It worked fine and I handled it by the Lens, not the body. It was the only deviation from my usual equipment. The temps the previous night were in the mid 40s, no humidity, and it was stored in case, inside truck. After paying over $400 to repair, I am scared to use these lenses, without having some guidance. Can anyone relieve my fear as to what caused the Circuit board to burn out under normal use? What about changing lenses with the power on? Is there a delayed response when it first begins to short out and when it actually locks up? Can shooting into the sun trigger this, cause it was a hot, sunny day? I also don't recall any static electricity.
