Where could the reset fasten on a Kindle be?
Manufacturing plant Reset Your Kindle E-Reader
From the home screen, swipe down to open the Quick Actions or select Menu.
Select Settings or All Settings.
Go to Device Options or select Menu.
Select Reset. For more established gadgets, select Reset Device once more.
Whenever incited, select Yes to affirm.
Also Look Here: www.kindle.com/support & Kindle support