[q] lg g2 f320 stuck at lg logo.. topic

Hi everyone..
Firstly i did rooting and applied g3 rom over stock room and kept my nandroid backup in twrp...After that when i tried to recover my stock rom using twrp backup it stuck at lg logo and doesnt goes further...i did try flashing the stock rom from this site using flash tool but it didn't worked..Can any one help me out from this problem?