원문 게시자: Dan ,
OK so we are clear here: You have to of the same Acer Iconia tablets using the same USB cable one is able to be seen by the PC and the other not. Both are working and both have the same OS revision. Try this, with the one that is working leave it plugged in and then using a second USB cable connect it to the second tablet. Is it able to be seen then? If not I suspect the USB port on the tablet is bad.