检查各接线接口是否出现松动，然后检查串口及中断号是否有冲突，若有冲突，应调整资源，避开冲突。再检查触摸屏表面是否出现裂缝，如有裂缝应及时更换。还需要检查触摸屏表面是否有尘垢，若有，用软布进行清除。观察检查控制盒上的指示灯是否工作正常，正常时，指示灯为绿色，并且闪烁。如果上面的部分均正常，可用替换法检查触摸屏，先替换控制盒，再替换触摸屏，后替换主机。如果是表面声波触摸屏可进行如下检修：如果是电阻触摸屏可进行如下检修：1）检查触摸屏的连线是否接对，其中一个连接主机键盘口的连线（从键盘口取5伏触摸屏工作电压）有没有连接，请检查连线。2）观察触摸屏控制盒灯的情况，如果不亮或是亮红灯则说明控制盒已坏请更换。3）如果确认不是以上请况，请删除触摸屏驱动并重启动计算机重新安装驱动，或更换更新更高版本的驱动。
Check whether each wiring interface is loose, and 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. It is also necessary to check whether there is dirt on the surface of the touch screen. If so, remove it with a soft cloth. Observe and check whether the indicator light on the control box works normally. When it works normally, the indicator light is green and flashes. If the above parts are normal, you can use the replacement method to check the touch screen, first replace the control box, then replace the touch screen, and then replace the host. If it is a surface acoustic wave touch screen, the following maintenance can be carried out: if it is a resistive touch screen, the following maintenance can be carried out: 1) check whether the connecting line of the touch screen is connected correctly, and whether one of the connecting lines connecting the keyboard port of the host (take the 5V touch screen working voltage from the keyboard port) is connected, please check the connecting line. 2) Observe the light of the touch screen control box. If the light is not on or the red light is on, the control box is broken. Please replace it. 3) If it is confirmed that it is not the above situation, please delete the touch screen driver and restart the computer to reinstall the driver, or replace the driver with a newer version.
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