Unplug the power cord to your GE JP 346BMBB range. This particular model contains an acrylic glass cooktop over the surface of the range.
Remove the screws located on the underside of the cooktop edges with your Phillips screwdriver.
Lift the glass cooktop up. Notice that the burners are attached to the underside of the cooktop.
Unplug all wiring running to the underside of the burners.
Remove the screws on the sides of the burners and unclip them from their harnesses.
Fit the burners in the new JP346BMBB cooktop. You can find a new cooktop for this particular model from the manufacturer, GE, or from appliance outlets that carry the model. Replace the screws and wiring.
Place the cooktop over the GE JP range and replace the cooktop securing screws.