Originally Posted by sgtcasey

On a Windows PC if you go to the Device Manager and select each USB Root Hub then select Properties you can check or uncheck the option to turn off the port to conserve power. On a desktop machine this is rarely needed since you're getting all the power you need from the wall plug. But on a laptop if you're running off battery you may need to uncheck this option.

I imagine a Mac laptop has a similar option somewhere.

Dave