first off, do not force the breaker to the on position,or something major will happen.If it is just the one room, unplug everything and shut off lights and the ceiling fans.Now go and reset the breaker, and if it stays, on ,thats good. Now go and turn each item on,one at a time, until the breaker trips. if it trips,leave the last item off.Now, reset the breaker, and if it stays on, leave last item off. The last item might be at fault.usually the ceiling lights are on a different breaker than the wall outlets. The wall outlet, where the fan was plugged into, may be faulty.Also the new breaker may be broken, if it fails to reset, with nothing turned on.before,with all on, the breaker may have been overloaded with everything trying to run.
miner, July 2009