ePartSolution-Samsung Galaxy Tab 4 SM-T330 T337A 8.0 Touch Screen Digitizer Glass Lens ePartSolution-Samsung Galaxy Tab 4 SM-T330 T337A 8.0 Touch Screen Digitizer Glass Lens White Replacement Part USA Seller If the touch screen doesn't work, releasing the cable and try to connect again. Sometimes touch screen doesn't work just due to the cable not connected well.