hi m8 (2) Talkback.
fist of all you need to remove the board from the housing as the talkback caps are on the underside of the board.
Look for the R414 & R413 caps and remove them this will stop your box from buzzing and freezing.
Then find the C427 & C428 caps and remove them too, this is the talkback caps once compleate replace the board in to the housing.