Nokia 808 Usb Jeck Points Missing Jumper Trick
https://gsmfixer.blogspot.com/2014/11/nokia-808-usb-jeck-points-missing.html
Nokia not connected with pc via usb cable problem creates when usb cable is damage or jeck points on motherboard damage. To solve this problem first check usb jeck or change the jeck with new one. If jeck is ok then trace all points on mobile circuit and apply jumper to any missing track as shown in diagram below.
Nokia 808 usb points damage on motherboard and not connected with laptop problem solved by tracing jeck points on motherboard.