Capacitive screen quotation capacitor screen fault repair method, the touch screen generally uses the serial port for signal transmission, the signal is taken from the PS/2 port, and the TPS screen is directly taken from the host power source.
If the indicator does not light, the signal is not taken and the PS/2 line on the control box may be broken. If the light is on, but it still does not flash, the control box is broken, so the user must replace the control box.
If you still can't replace the control box, it may be that the screen is pressed too tightly. You need to loosen the screws around you a little. Because the touch screen is made of special materials, it is not easy to damage. If the serial port is bad or disabled, it will cause the driver to fail to install, because the serial port will be automatically found when the driver is installed.
Even if it can be installed, the mouse will not move or cannot be positioned. It is best not to use the serial mouse to judge the quality of the serial port. It is possible that the serial port 9 is different for each other. If the screen is pressed, or the ground wire is not connected, it will result in the inability to locate. If some areas cannot be clicked or are slow to respond, it may be affected by dust. Unpack the case to remove dust.