A. Restart the faucet panel, if the panel turn normal, then it might be temporary error.
B. If touch is very unsensitive, please check the software version make sure it is correct version base on the hardware version.
C. Please check if the date cable is matching color sequence, unless it is directly out of manufacture.
D. If the panel remain malfunction, then you might need to change a faucet PCB.
E. If the faucet is shaking or break off, then you might need to change a new faucet without the faucet panel.
F. If display panel shows white screen or black but with sound effect
a. please restart the unit by unplug the power cord, if still problem still exist,
b. please try to make sure the data cable is firmly connected, you may unplug them and try to plug back in to make sure, if it is still occurred,
c. try to open the touch screen back cover and remove the touch PCB and reinstall it again by press gentle power but make sure it is firmly connected until you hear or feel a click,
d. if all procedure above been tested and note helped, you may consider replace a new PCB or touch screen base on the test result to find out which one may not work properly.