testpoint i try with ur picture in tutorial and i was change the usb cable. usb port with other pc but nothing. only the red indicator show if the usb cable pluged. i think the xperia not voltage coz i try with power supply no response.
my lt25i usb driver not detec with test point. i use titorial and change the cable data and pc but its same no driver detec. only red indicator show 30 second.please help