problem with headphones hardly request plz solve my problem

i have problem with my z1 c6902 it stopped detecting any headphones and headset and aux
i have try to reset phone and going back stock kitkat but no detecion of headphones
when try with soundabout app it works

so what i do ?
if it is software problem why not solved with flashed rom
if it is hardware problem how sound about fix this

plz help me to get my z1 back to its original state also try everything in smart connect