To recover the NMP660 to factory state you will first create a Recovery USB disk
Making the Google Chrome Recovery USB disk for NMP660
Step 1. Using a Chrome browser install the Chromebook Recovery Utility app
Step 2. Click on “Launch app”.
Step 3. Click on “Get Started”
Step 4. Click on Select a model from a list and select “Viewsonic” and “ViewSonic NMP660 Chromebox” from the dropdown options and click Continue
(Note: If necessary, please select “Erase recovery media” from the gear icon at the top right first to ensure that the USB flash drive is formatted and ready to receive the new image.)
Step 5. Insert your USB flash drive or SD Card and Select media you will use from the dropdown list. Then click on “Continue”.
Step 6. Click on “Create now”
IMPORTANT: All data and partition on your recovery media will be deleted
Writing will begin…
Step 7. Click “Done”. You have created you recovery media.
Procedure to recover the ViewSonic NMP660 with recovery media
1. Plug the power adapter into the unit and make sure the unit is powered off.
2. Connect the video output using a HDMI cable to a monitor. Do NOT plug in any devices to the USB ports on the NMP660 at this time.
3. Using a paper clip, insert into the reset slot and press and hold down reset button (right side of unit). While holding the reset down, press the power button to turn the unit on. Release the reset button after you hear the fan run on high momentarily.
The system will boot up with the following screen.
4. Insert the Chrome recovery USB flash drive you created into one of the front USB ports.
The screen will blank out momentarily; if the USB flash drive is detected, the recovery automatically commences within 5 seconds. If this does not occur, please try unplugging the flash drive and plug it into the other front USB port. (Note: Do not use any of the rear USB ports for recovery.) If it does not work, Go back to step 1 and try again. Otherwise, the following screens will appear.
5. Once complete, unplug the Chrome recovery USB flash drive and reboot the NMP660. The following screen should appear.
Congratulations recovery is complete.