1. No response from touch screen for the first time after installing driver

Symptoms: A touch screen, the first time you start the touch screen after installing the driver will not respond.

[Touch Screen Maintenance Technology Analysis and Processing]
First of all, confirm whether the touch screen line connection is correct. If it is not correct, all lines should be connected properly after shutdown. Then check whether there is conflict between the device and the serial port resource in the host. Check the hardware devices and adjust them. For example, the default IRQ of some network adapters is 3, which conflicts with the IRQ of COM2. At this time, the IRQ of the network adapter should be changed to idle and unused. IRQ.

2. Touch no response after using for a period of time

Symptoms: A touch screen, no response after normal use for a period of time after power on.

[Touch Screen Maintenance Technology Analysis and Processing]
1) Check if the hard disk is set to be turned off in the Monitor Energy Saver setting of Wlndows 9x. Method is to right-click on the desktop, select “Properties” command, and then from the dialog box, select the “Screen Saver” tab, click the “Settings” button, set the parameter to “Power Plan” to “Always open” The rest are “never.”
2) In some applications, due to poor grounding performance, the control box housing is covered with a large amount of static electricity, which affects the operating electric field inside the control box and causes the gradual failure of the touch. At this time, use a wire to ground the control box and restart it.
3) As the surface acoustic wave touch screen is working, the surface of the touch screen is covered with sound waves. If the touch screen is not rubbed for a long time, excessive accumulation of dust will block the reflection stripes of the waves and cause the touch screen to not work properly. For touch-monitors, use a clean business card or banknotes to gently wipe the dirt around the reflection stripe through the gap between the front cover of the monitor and the touch screen, and then restart the computer. For the touch-sensitive machine, open the front cover of the monitor, wipe the dirt around the reflective strips with a clean towel, and then restart the computer.
4) Many touch-sensitive machine touch screen control boxes use power from the all-in-one machine instead of power from the host. Therefore, you should check whether the 5V output of the all-in-one power supply is correct. Sometimes the instantaneous current is too large, causing the fuse to burn. Need to replace the fuse.

3. Touch screen drop accuracy

Fault phenomenon: a touch screen, the click accuracy is reduced, the cursor is difficult to locate.

[Touch Screen Maintenance Technology Analysis and Processing]
1) Run the touch screen calibration program. (Start – Settings – Control Panel – Sonic Screen – Caliberate button).
2) If it is a newly purchased touch screen, please try to delete the drive, then power off the host for 5 seconds to re-install the drive.
3) If the above method does not work, it may be that the reflection fringes of the sound wave screen during the transportation process are slightly damaged and cannot be completely repaired. You can locate the equidistant deviation from the calibration bull’s eye in the opposite direction (relative to the direction of the mouse deviation).
4) If the sound wave screen is not used after a certain period of time, the reflective stripes around the screen or the transducer may be covered with dust. If you are using our KA type cabinet, you can open the cover with a dry one. Clean the surface with a soft cloth, industrial alcohol, or a glass cleaner, and rerun the system. Note that the upper left, upper right, and lower right transducers cannot be damaged. Then turn off the power and restart the computer and recalibrate.
5) The surface of the touch screen has water droplets or other soft objects sticking to the surface. The touch screen misjudges that the hand touch causes the surface acoustic wave screen to be inaccurate, and it can be cleared.

4. Touch screen cannot be calibrated

[Touch Screen Maintenance Technology Analysis and Processing]
1) If you are using a Lenovo host computer, the MOUSEWARE software installed in it conflicts with the touch screen driver. Please delete the software and restart the calibration procedure.
2) It may be that the touch screen control card receives the operation signal before the host starts loading the touch screen driver. Please restart the computer and recalibrate it after power off.
3) The touch screen driver may be installed abnormally. Please delete the driver and reinstall it. (Remove from the Control Panel Add Remove Program.)
4) It may be that after the sound screen is used for a period of time, the reflective stripe around the screen is covered with a lot of dust and cannot be calibrated. If you are using our KA type cabinet, you can open the cover with a dry soft cloth. Wipe, and note that the upper left, upper right, and lower right transducers cannot be damaged. Start the computer and calibrate.

5. The mouse stays at a certain point on the touch screen

[Touch Screen Maintenance Technology Analysis and Processing]
This happens because the touch screen of the resistive screen (the surface of the resistive screen is divided into two parts: the touch area and the non-touch area, and the click of the non-touch area has no response) is suppressed by the display housing or the cabinet housing, which is equivalent to a certain The point has been touched. If the enclosure is pressed against the touch area, you can increase the distance between the enclosure and the monitor screen. If the monitor enclosure is pressed against the touch area, you can try loosening the monitor enclosure screws a little.

6. Touch screen operation is unstable

Symptoms: A touch screen, its work is very unstable, sometimes normal clicks, sometimes no response.

[Touch Screen Maintenance Technology Analysis and Processing]
In response to this phenomenon, it should be emphatically checked whether the wiring interfaces are loose or whether there is a conflict between the serial port and the interrupt number.

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