I have AVIC-MRZ77 from an imported car from Japan. When I first turned it on it was showing all the options like DVD/USB/SD etc. But after few runs now I can see only FM/AM/TV/BT options.. It is not showing DVD/USB/SD options. I checked all the system settings by google translating but unfortunately I could not find setting related to this. Also in TestMode it also does not show SD or USB contents. So I also cannot change language by copying files. Any one knows how to solve this issue when SD and USB are not working?
