Is your iPad's touch functionality blown out? Have you replaced the touch screen on your iPad 2 3 4 and it's still not sensitive to the touch. This may mean that the touch IC module on your motherboard is blown. Use this chip to replace the old one. Please note that this repair requires a highly skilled technician that is familiar with the microsoldering removal and installation of a BGU chip. If you are an experienced technician, please note attempting this repair at risk of damaging the board and other components. This repair should only be performed by skilled professionals.