3.5 inch touch screen raspberry pi.First check whether there is looseness in each wiring interface, then check whether there is conflict between serial port and interrupt number. If there is conflict, adjust resources to avoid conflict. Then check whether there are cracks on the surface of the touch screen. If there are cracks, replace them in time. You also need to check the surface of the touch screen for dirt, if any, remove it with a soft cloth. Observe and check whether the indicator light on the control box is working normally. When it is normal, the indicator light is green and flashes.

3.5 inch touch screen raspberry pi.First check whether there is looseness in each wiring interface, then check whether there is conflict between serial port and interrupt number. If there is conflict, adjust resources to avoid conflict. Then check whether there are cracks on the surface of the touch screen. If there are cracks, replace them in time. You also need to check the surface of the touch screen for dirt, if any, remove it with a soft cloth. Observe and check whether the indicator light on the control box is working normally. When it is normal, the indicator light is green and flashes. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.