A, surface acoustic wave touch screen fault phenomenon analysis and processing methods    
Fault one: touch deviation 
Phenomenon: the location touched by the finger and the mouse arrow does not overlap.
Analysis: After installing the driver, when correcting the position, there is no vertical touch bullseye center position. Treatment: Correct the position again.  
Fault two: touch deviation  
Phenomenon: part of the area touch accurate, part of the area touch deviation.
Analysis: surface acoustic wave touch screen around the edge of the acoustic reflection stripe above the accumulation of a large amount of dust or scale, affecting the transmission of acoustic signals caused by. 
Treatment: clean the touch screen, pay special attention to the touch screen on all sides of the acoustic reflection stripe clean, clean the touch screen control card should be disconnected from the power supply.
Fault three: touch no response
Phenomenon: touch the screen when the mouse arrow without any action, no change in position.
Analysis: The phenomenon caused by a number of reasons, the following instructions one by one:
(1) surface acoustic wave touch screen around the edge of the acoustic reflection stripe above the accumulated dust or scale is very serious, resulting in the touch screen can not work.
(2) touch screen failure.
(3) touch screen control card failure.
(4) touch screen signal line failure.
(5) the computer host serial port failure.
(6) The computer's operating system is faulty.
(7) touch screen driver installation error.
Second, the resistive touch screen failure phenomenon analysis and processing methods
Fault one: touch deviation 
Phenomenon: the location touched by the finger and the mouse arrow does not overlap.
Analysis: After installation of the driver, there is no vertical touch bullseye center position when correcting the position. Touch screen on the signal line contact is poor or broken.
Treatment: recalibrate the position; find the breakpoint to reconnect or replace the touch screen.
Fault two: touch deviation
Phenomenon: do not touch the mouse arrow always stays in a certain position, touch, the mouse arrow in the touch point and the original stay at the midpoint.
Analysis: there is a foreign body (non-active touch) pressure resistive touch screen within the effective working area.
Treatment: the effective working area of the resistive touch screen will be pressed foreign objects removed.
Fault three: touch no response
Phenomenon: touch the screen when the mouse arrow does not have any action, no change in position.
Analysis: The phenomenon caused by a number of reasons for the following descriptions one by one:
(1) touch screen failure
(2) touch screen control card failure.
(3) touch screen signal line failure.
(4) the computer host serial port failure.
(5) the computer's operating system failure.
(6) touch screen driver installation error.
Third, the resistive screen common failures and troubleshooting
1 resistive touch screen mouse only moves in a small area or resistive touch screen is not allowed
Generally in the first time to install the driver will appear in this case, please run the touch screen calibration program. After changing the monitor resolution must also run the touch screen calibration program (start - program)
2, the mouse has been in the display at a point on all sides of this situation is because the resistive screen touch area (resistive screen surface is divided into two parts of the touch area and non-touch area, click on the non-touch area is no response) by the display shell or cabinet shell pressed, equivalent to a point has been touched. If the cabinet shell pressed touch area you can adjust the distance between the cabinet and the monitor screen, if the monitor shell pressed touch area you can try to loosen the screws of the monitor shell to try, if still not, please contact with our technical department.
3, the mouse and hand touch moving in the opposite direction, which is the touch screen control box and touch screen connected to the four-wire connector reverse the direction of the adjustment can be.
4 touch no response check whether the touch screen connection is connected, one of the host keyboard port connection (from the keyboard port to take 5 volts touch screen working voltage) there is no connection, please check the connection to observe the touch screen control box lights, if not bright or bright red light means that the control box has been bad please replace. If you confirm that it is not the above please remove the touch screen driver and restart the computer to reinstall the driver, or replace the driver with a newer and higher version.
Are there devices in the host and serial port resources conflict check the hardware devices and adjust. For example, the default IRQ of some network cards after installation is 3, and COM2 IRQ conflict, at this time should be changed to the IRQ of the network card idle unused IRQ. may also be the computer motherboard and touch screen control box is not compatible, please replace the host or host board. If the touch screen in the use of a longer period of time found that some areas of the touch screen can not touch, it may be a bad touch screen please replace the touch screen.
Fourth, infrared touch screen common failures and troubleshooting
1. Decision double click is not very sensitive
Open the infrared screen more accurate program to adjust its sensitivity, the sensitivity is turned down.
2. In what case will appear drift phenomenon 
As the infrared screen works on the principle of infrared to work, so usually when things such as sleeves touch the infrared screen also play a role in touch (such as hand points touch screen, sleeves also with the point to the screen, there will be the mouse pointer is not in the location of the finger points, this problem is not a drift phenomenon).
3. In what case the touch screen for calibration
If you are the first installation of infrared touch screen or your computer's resolution has changed, then you must recalibrate the touch screen. Calibration method is as follows: click the "calibration" button, when the calibration interface is displayed, please click the icons on the interface in turn, the calibration interface will automatically disappear when the calibration is complete, the data generated by the calibration will take effect immediately. If you think the calibration effect is not satisfactory, you can calibrate several times until the pointer tracking effect is satisfactory. Then press the "Confirm" button.