A full factory reset clears corrupted user data that mimics firmware bugs.
Instead, use your Coby TV as a basic display with an external HDMI source. That is the most practical and reliable solution. coby tv firmware update
Some regional distributors bought bulk Coby stock and may have an internal FTP server with firmware. Search for “Coby TV parts distributor” and email their support. A full factory reset clears corrupted user data