i have a (model) ceche ps3. i only use it as a server for music and movies from my pc. the other day i upgraded my firmware to the latest version after many years of never upgrading the firmware. now i have the 'cinavia' issue on some movies. the 'fixes' i found on line do not work.
in doing some research i noticed that v3.10 was when cinavia was added.
is there any way of going back to v3.01 and if so how would i do it?
i think you must be using Official Firmware right now so your cinavia is not working. The only way to downgrade to 3.10 is to using progskeet or other flash tools to get the valid dump and then patch it with the newest Custom Firmware like Rogero 4.55 + multiman then you can get your cinavia working again.
if you don't have the tools just bring it to the professional to downgrade it.
You could put the movies on a PC and use ps3 media server and stream the movies to your ps3 or a program called plex.tv to get rid of the problem as well. That's what I do on my ofw ps3. I hope this helps