The product CS12800F101E/CS12800F101P uses ten-point capacitive touch.
Capacitive touch is very sensitive to power noise. Ripple voltage/current from the power adapter will cause the LCD ripples, and will also cause the capacitive touch malfunction. If you use the APK Multi-Touch under Android to test, you can find the touchpoint float. There are several ways to solve this problem:
1) Use a high-quality power adapter. Or a battery to provide power like a cell phone or tablet PC.
2) If the power adapter isn’t good enough, make sure the CS10600U070E/CS10600U070P power input connector Pin 3 is connected to the Ground. This method can eliminate the problem totally. You can test it by touching the GND of CS10600U070E/CS10600U070P with one hand, while the other hand operates on the capacitive touch screen. In this case, the user’s body acts as the Power System Ground.