In the USA, sudden microwave shutdowns are not unusual and can be caused by several factors. It might be something like loose internal connections or overheating protection kicking in. From experience, https://midweststandards.com/microwave-oven-repair/ these issues are often fixable with a quick inspection. Many repair services in the US offer fast response times and can identify the cause without long delays. Getting it checked early is a good way to bring it back to normal and avoid further inconvenience in your daily routine.