It sounds like 1 of 2 things. You may need to connect at least a mouse (you should be able to use the on screen keyboard with the mouse once connected)
Or you may need to do a fresh install of windows if it is actually frozen and does not respond even after you have tried with a mouse.
I would recommend the Dell Micro USB Dongle for data and charging. (or another similar accessory that does the same thing)
[image|836674]
you can find it from Dell [http://accessories.dell.com/sna/productdetail.aspx?c=us&cs=19&l=en&sku=470-abes#Overview|HERE]
This will allow you to have the device connected to power while you plug in any usb accessories. You can even plug in a USB hub to it. Just make sure you have everything you need plugged in before you turn on the tablet otherwise some accessories may not receive power.
I hope this helps,