Hey @rfidder, as stated, if you are unable to get your Chime into setup mode after trying the troubleshooting steps that have been discussed in this thread, you will need to follow up with our support team here. This is a neighbor to neighbor forum and not a direct line to support forum.
I recommend reporting this to our support team in order to get the adequate follow up, especially if the troubleshooting steps discussed have not resolved your concern. The support team can look into your specific device and account and I can ensure you they will get you to a solution speedily!
I also encourage you to come back to forum once you have reached a solution to share this to help other neighbors in this forum that have not reached out yet. 