Hi. Maybe I have the wrong website, but I hope for your help.
In short, I have a 4G modem connected to the laptop via a USB extension cable, and is likely due to the lack of power. So the idea was born. If you disable the one not used me USB port on the laptop then addressed whether the problem or if the USB port is not involved, and food and so he doesn't need?
If the modem without extension is not disabled, then the laptop gives enough power to the port and issue in a passive extension cable.
If the modem without extension is also disabled - can help disable the other devices, and may not help.