Troubleshooting method for touch vending machine

Nowadays, vending machines can be seen everywhere, and there are more and more types. The touch vending machine is a common model now, but this kind of machine also occasionally has some faults, just like the problem of the touch screen not responding, we can solve this kind of fault as follows: First, Observe whether the indicator light on the control box is working properly. When it is normal, the indicator light is green and flashing. But if the above parts are all normal, you can check the touch screen with the replacement method, first replace the control box, then replace the touch screen, and replace the host. Then, check whether each wiring interface is loose, and then check whether there is a conflict between the serial port and the interrupt number. If there is a conflict, adjust the resources to avoid the conflict. Check whether there are cracks on the surface of the touch screen. If there are cracks, replace them in time. It is also necessary to check whether there is dirt on the surface of the touch screen, if it is cleaned with a soft cloth.