If you cannot find them you will need to break the glue seal between the plywood and the granite before you can remove the plywood.
Remove granite countertop from island.
Remove the rounded bullnose tile along the front of the countertop.
Granite counters are a beautiful and long lasting addition to many homes.
Because of their expense some homeowners choose to remove them and install them in new.
This frees the countertop and also reduces its weight making it much easier to lift out.
How to remove granite countertops.
Remove the screws from the plywood layer under the granite countertop from inside the cabinets.
First carefully pry the tile running up the backsplash away from the wall.
Remove the tile from the surface of the countertop with a flat chisel.
Look for screws running up through the cabinet top support into the bottom of the plywood.
However irreparable damage can happen to either your counter or your cabinets facilitating the need for a replacement.
Use a drill and screw tip.