Any prying tool will work, you need to work on the back cover with the LCD facing down. Pressing one by one to snap open the rear cover, you should start from the USB port first because the metal bracket will help you pry open the rear cover easier than other places, or the S Pen opening, prying open the rear cover from there also a good starting point.After open one or two you will find where to press open the locking tabs, I think one or two inches apart.

Source: Samsung Note Pro 12.2: Screen flickering problems – Page 3 – Android Forums at AndroidCentral.com