Users of the Amazon Fire TV or Amazon Firestick may experience a problem where a message appears that says “Format not supported“. When this message appears, you are unable to use the Fire TV / Firestick.
This message is usually related to the Fire TV / Firestick being set to a screen resolution that is not supported by the TV it is connected to. In this post we’ll cover some troubleshooting steps you can take that should fix the “Format not supported” error and get your Firestick back in working condition.