My lexia not working

[cooby]

2 year ago I bought a Clone Lexia 3(seems not the same) interface. Today when I typed in USB port it nothing happened and device not recognized at all and the led light of the interface doen’t light on. I change the cable and USB port and athor laptop but the same. I opened the interface and mesured inside and it is supplied with +5V from usb port. If anyone has any electric diagram or know what integrated circuit makes USB part?