samsung i9000 usb connection problem

[birdonsky]

i have samsung i9000
when connect to pc show error message on pc screen and not detect by kies

( i have install all drivers in pc not driver problem )

-when i put the battery phone power on automatic , but i can power off the phone from switch buttom ( power buttom working normal)
-i can put the phone to download mode by useing usb clip
also not detect the phone in download mode same error message

-phone charge normal

-i clean phone conntector also same problem
-i used hard resert also same problem
-i think it is hardware problem but i dont know how to solve it
please if some one know this issue tell me

thanks in advance

[clebo]

i had a phone wiyhthe same problem open the phone and check if thre no liquid damage or bunt componants