Hi I have following problem since a few days. After connecting SJ8 Pro with PC, the camera shows usb cion on the screen but none device is detected by PC. I have tried different cables, pc, usb ports (2.0, 3.0) and still the same. The camera is not detected in the system. AmbaUSB shows nothing, Even when I'm trying to run in bootloader mode (cable plugged with shutter button pressed and removed battery). The camera does not turn on. A few days before everything was ok. Does anyone observe such problem? Any solution? Thanks