You can restore the factory settings to your SHIELD Tablet using the following procedure. Note that this will remove any data on the device.
- Shut down the device with long press (8sec) Power button
- Press and hold Vol down key
- Press and release Power key
- Device enters fastboot mode
- Select Recovery mode option (using Vol up/down for navigation and power key to select)
- Device enters recovery mode (after showing NVIDIA boot logo) with Android Robot screen.
- Press and release Vol UP + Power button simultaneously
- Then select wipe data/factory reset with Vol up/down key to navigate and power key to select