为什么我的电脑与F940触摸屏无法通讯。我的通讯线的接法是DB9孔2----------------------3
                                                                                                                         3----------------------2
                                                                                                                         5----------------------5
                                                                                                                         6----------------------4
                                                                                                                         8----------------------4
                                                                                                                         4----------------------6
                                                                                                                         4----------------------8

两端7、8短接，不要与4连接

谢谢老大，明天我到公司去试下。