Err, it's not that hard.
-drop the TV business ENTIRELY. Don't even R&D new tech to sell to other companies.
-Keep Sony pictures
-Keep Sony gaming
-Keep Sony music (software, not hardware)
-Keep Insurance Provider
-drop EVERYTHING else. No phones, no mp3 players, no cameras, no sex robots, NOTHING.
They need to just be a media company + insurance provider. Their media divisions are profitable in general and they're well known names there. It's all the hard tech R&D and hardware where they have faded into irrelevance and take huge losses. Though it's mainly the TV business that is sinking them year after year.