Frequently asked questions about the touch screen cash register

- Aug 28, 2019-

1. The touch screen cash register does not respond to power on.


Fault analysis: Part of the motherboard inverter is damaged


2. The touch screen is powered on with a blue screen. After 10 minutes of power on, the screen turns blue.


Fault analysis: The motherboard CPU is bad. The motherboard LCD negative voltage is too low, the LCD negative voltage is 0, the motherboard is faulty.


3. Touch screen is black


Failure Analysis: Contrast Problem


4. The touch screen is out of order, sometimes white screen


Fault analysis: touch panel failure


5. Touch screen cash register black screen, dead screen


Fault analysis: inverter burnout


6. Power on and burn insurance


Fault analysis: The motherboard is faulty, the LCD is faulty, and the motherboard is also damaged. The motherboard power supply is partially damaged. The motherboard is faulty and there is a large current burning.


7. The backlight is not bright


Fault analysis: The motherboard inverter is faulty; the inverter is protected from power-on black screen; the LCD is faulty and the touch panel is damaged.


8. The touch screen is normal and the motherboard program is not responding.


Fault analysis: motherboard failure, replace the motherboard


9. Poor touch, touch failure; insufficient operational sensitivity


Fault Analysis: Touch resistance abnormality / silver paste line resistance infinity / replacement touch panel / client program problem


10. The touch screen screen cannot be switched


Fault analysis: cracks on the surface of the panel lead to poor touch


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