Originally Posted by yifanlu
Password box? Are you talking about SSH? You need usbNetwork installed to have SSH. If you're talking about the progress bar and it's stuck at the "Please wait..." screen, then you may have bricked the kindle.
As cloudyvisions indicates, you can set a password on your kindle so that when you power it back on (momentarily slide the switch to ON), a small prompt box appears overlaying the screensaver, where you can enter a password. This can prevent unwanted users from using your kindle and potentially purchasing books with one-click.
CLOUDY VISIONS - the box says "move the 5-way down if you forget your password" Have you tried that?
But it sounds as if a Kindle is being sent but hopefully you can fix it before that happens.