yes I have rooted phone with broodcom rom a week earlier
but phone was working perfectly without any problem, until last night when battery was only 4% and morning when I try to on the phone, it was not powering on
What is that broodcom ROM? Is recovery screen try to use Vol up + power button to see whether it is coming in recovery mode. If not then try to go into download mode by using Vol down + home button,+ power and then flash official firmware with Odin. If you are not able to go into either of the modes then i am afraid that you bricked your phone and you need to go to service center..