From Factory Reset
Google Nexus 10 Factory Reset (Recovery Mode) Instructions
- If your tablet is on, power it off.
- Press and hold Volume Up + Volume Down + Power until the device powers on. You should see an image of an Android lying on its back.
- Press Volume Down twice, until the screen says "Recovery mode."
- Press Power to restart into "Recovery mode." You should see an image of an Android with a Red triangle after a few minutes.
- While holding down Power, tap Volume Up
- Use the volume keys to scroll to "wipe data/factory reset" and press Power to select it
- Scroll down to "Yes - erase all user data" and press Power to select it