SamyGO

You know, there is another problem:
If you`ll find and fix fw code (firmware you gave is encrypted and we do not know the key = not possible to analyze it and patch as well), but might anyone does the patch, here is another problem - we can`t flash firmware by hand = bricked TV. it is like CI+ on B series TV but with much more security levels.
I won`t be bad prophet, but you have little chance to get it rooted soon

... over telnet/console bla bla bla...
it is impossible. I meant just theoretically...