Thanks for the quick update on this! Those steps just about covers anything I can think to be related to Chime troubleshooting. As you know, there is not much to explore as these are often straightforward in operation. The only unique factor that we have not checked, is network settings. As you’ve mentioned this working prior, if you have not changed your network equipment or settings, you can likely skip this step. If you’ve had a network change, please check for any network settings that might block the Chime or audio from producing sound. Our help center article about ports and protocols might help further, in this case.
Otherwise, this sounds like a potential concern with the Chime speaker, or even software, in which our support team can certainly take a closer look. Please give our support team a call at one of the numbers available here. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support.