When your iPad is off, you can turn it on by following these steps:
Hold down the Sleep/Wake button at the top of your iPad, as shown in Figure 1-1, until the Apple logo appears on the screen.
If you see a blank screen after pressing the Sleep/Wake button, your iPad may not have enough power to start.
Wait a few seconds until the Home screen appears, as shown in Figure 1-2. This tells you that your iPad is now on.