檢查各接線接口是否出現(xiàn)松動，然后檢查串口及中斷號是否有沖突，若有沖突，應(yīng)調(diào)整資源，避開沖突。再檢查觸摸屏表面是否出現(xiàn)裂縫，如有裂縫應(yīng)及時更換。還需要檢查觸摸屏表面是否有塵垢，若有，用軟布進(jìn)行清除。觀察檢查控制盒上的指示燈是否工作正常，正常時，指示燈為綠色，并且閃爍。如果上面的部分均正常，可用替換法檢查觸摸屏，先替換控制盒，再替換觸摸屏，后替換主機。如果是表面聲波觸摸屏可進(jìn)行如下檢修：如果是電阻觸摸屏可進(jìn)行如下檢修：1）檢查觸摸屏的連線是否接對，其中一個連接主機鍵盤口的連線（從鍵盤口取5伏觸摸屏工作電壓）有沒有連接，請檢查連線。2）觀察觸摸屏控制盒燈的情況，如果不亮或是亮紅燈則說明控制盒已壞請更換。3）如果確認(rèn)不是以上請況，請刪除觸摸屏驅(qū)動并重啟動計算機重新安裝驅(qū)動，或更換更新更高版本的驅(qū)動。

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.