lg g3 d850 flashed d851 rom brick help

I need help i keep looking and googling but nothing for me i tryed to flash t mobiles cloudy rom on my att lg g3 now its bricked good i tryed lg flash tools i get failed i have no recovery mode no nothing just a black screen every now and then when the battery dies and i plug it in it will show the charging for a sec the it makes nose when i plug it in the pc lets me change the port to 41 idk help