In detail about the issue : (Platform - iMx6 sabresd)
1 . USB is working for Host/Mass storage (Mouse/Pendrive) But it is not working as a device
2 . PC is not detecting the board via USB(Even device manager, PC not able to recognize the usb)
3 . Hardware lines are proper which verified by probing the USB_ID line.
4 . Board is booting properly with last flashed images.
Please let us know how we can recover from this issue(Boot from emmc only is available)