xadow mainboard usb unknown device

xadow main board v1.3
windows 7

the mainboard worked 2 months on this pc
when i connect the board on usb port
the device manager shows
for 5 seconds : seeeduino xadow com7
and then the device manager refresh the screen
and shows under usb controller : unknown device
no led lights - never

i tried some resets
i change the pc
i reinstall the usb driver

always the same
minimindOct 06,2015 18:38 PMAdd Comment


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