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The hammer seems to have gone dead, more or less - if the carriage is responsive in the usual manner, but nothing is put upon the page, that would seem to be the case.
Does the typewriter make any noise aside from the warning beep perhaps, occasionally but not constantly, and the movement of the carriage?
If not, then your typewriter will require repairs. (Replacing the hammer, and/or the circuitry that goes with it, is not an easy repair to do right, at all.)
Brother Authorized repair centers in your region can be found and contacted, but to do so, I have to know what your region of the US is: please tell me your zip code or town/city and state/region in Reply, and I will get you that contact (and address) information.