I seem to be having the same issue. My daughter was in the middle of an update on her ipad2, and it failed.
The ipad will now only boot to the connect to iTunes screen with the iTunes logo and usb cable. I connect to iTunes, and am prompted with a message that the ipad must be restored. I click restore, and during the "extracting" step in iTunes, the ipad shuts off causing an ipad can't be found message with no error code. I've tried this many times. I've updated to most recent iTunes, hard booting the ipad, but I can not get the ipad to stay on and connected to restore from iTunes.
please help!