Dears plz i need ur help, i have nexus 6 and i have installed android 7.0 from nexus root app, nd after 2 months i found that my mobile cannot connect to the laptop ( CHARGING ONLY ) and when i open in bootloader mode it says connect usb data cable , tried many cables and many laptops , i have wiped the phone as i thought its a software error but now i cant do anything , any help plz ?