The Future Passive

Future passive with WILL

Structure: WILL/BE + PAST PARTICIPLE (+BY+NOUM)

Ex. The computer will be repaired.

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?future-1

Future passive with BE GOING TO

Structure: BE GOING TO + BE + PAST PARTICIPLE (+BY+NOUM)

Ex. The computer is going to be repaired.

https://www.youtube.com/watch?v=tQ_s-OIfsf0