'and even manual control didn't work?'
There is no manual control on the 777.
A couple of spoilers will function via cables and you can also crudely jerk the stab incrementally with cable inputs but Boeing says that these will "allow the pilot to fly straight and level until the electrical system is restarted."
Without electricity the airplane cannot be maneuvered.
Last edited by Dropp the Pilot; 14th Apr 2022 at 15:35.
Reason: editing