Hello,I have not been able to use my usb ports at all. I'm starting to think they are bad. Can you please tell me what you see, or what happens when you plug in usb keyboards, mouses, usb sticks? How do I know the apad has detected it? Is there a particular sequence you have to do when uses these devices? I also cannot connect the apad to a pc either. It does communicate with Windows, but does not successfully install the device (windows xp sp3 32-bit).Is there a difference between the top port and the bottom port? Is one for certain types of devices and the other for something else?