I have the piggyback plugged into my PNP harness on my 01 is300. When hooking it up to the laptop, nothing at all happens. The laptop (old windows XP dell) does not recognize nor even displays anything is plugged it on device manager. I have tried different USB ports and USB cables. The Greddy software and USB drivers are installed and set. Even when hooking it up to the laptop, the communication light only stays constant with no blinking. I have tried on multiple laptops but could not get it to connect. I have 12 volts going to the ECU and see no reason why it would not connect. it seems like the Greddy does not even send power or signals to the USB cable for the laptop to sense something. Could be the female USB type-B is broken? or is the ECU fried or faulty?