Horizontal gray line on iphone 2g !! ??any idea??

[nvrmndryo]

hi , i got this gray horizontal line on my iphone 2g display from 2 days , it was small but it has became full line now ,, i dnt knw hw it happened , i bought local data cable for my phone so maybe thats the reason or i dnt knw .

so anyone has faced this problem ? its related to some ic or display ? do i need to change my display ? how much this will cost , n from where can i get it done ? i live in pune ,,,n there is no authorized service center here ....
<<<< u can see image here ..