Briefly, I updated the Skyview to 13.0.3 and performed the transponder update. I thought the update went fine with version number SW 2.06 showing on the status. However, once the system was rebooted, the transponder was offline. There are similar examples from the Dynon forum that the transponder may have to be shipped back to them to be reprogrammed. I will post a new message once I hear from Dynon support. David