I've had a 2nd gen dot up and running for quite some time. A couple of weeks ago, I had to unplug it to rearrange some cables. When I plugged it back in, it wouldn't connect to my wifi. I went through the standard steps - unplug, reset, etc. Ended up with a constant blue ring, nothing else. I've since had Amazon send two new dots, same problem persists - the dot will never turn orange or connect with the app on my phone. Any ideas? Thanks!