1：观察触摸屏信号指示灯，该灯在正常情况下为有规律的闪烁，大约为每秒钟闪烁一次，当触摸屏幕时，信号灯为常亮，停止触摸后，信号灯恢复闪烁。
2：如果信号灯在没有触摸时，仍然处于常亮状态，首先检查触摸屏是否需要清洁；其次检查硬件所连接的串口号与软件所设置的串口号是否相符，以及计算机主机的串口是否正常工作。
3：运行驱动盘中的comdump命令，该命令为dos下命令，运行时在comdump后面加上空格及串口的代号1或2，并触摸屏幕，看是否有数据滚出。有数据滚出则硬件连接正常，请检查软件的设置是否正确，是否与其他硬件设备发生冲突。如没有数据滚出则硬件出现故障，具体故障点待定。
4：运行驱动盘中的sawdump命令，该命令为dos下命令，运行程序时，该程序将寻问控制卡的类型、连接的端口号、传输速率，然后程序将从控制卡中读取相关数据。请注意查看屏幕左下角的x轴的agc和y轴的agc数值，任一轴的数值为 255时，则该轴的换能器出现故障，需进行维修。
5：安 装完驱动程序后进行第一次校正时，注意观察系统报错的详细内容。“ 没有找到控制卡”、“触摸屏没有连接”等，根据提示检查相应的部件。如：触摸屏信号线是否与控制卡连接牢固，键盘取电线是否全部与主机连接等。
6：如仍无法排除，请专业人员维修。
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