Cause Analysis:

○1 The computer's VGA or HDMI interface is faulty.

○2 The VGA or HDMI signal cable is faulty.

○3 The signal source does not select the corresponding signal input option.

○4 The signal wire is not tightened.

Approach:

○1 Reconnect the signal cable and tighten it.

○2 Select the corresponding signal input source.

○3 Make sure the video output signal of the computer is normal.

Reason analysis: During the last calibration operation, the center position of the bullseye was not touched vertically.

Solution: Re-calibrate.

Reason analysis: The sensitivity of the touch screen is too high.

Solution: find and open the calibration program and reduce the sensitivity.

Reason analysis: The touch screen adopts infrared or optical touch technology, which will not cause drift. When the mouse pointer is suddenly not at the position of the finger touch point, it is because the touch effect occurs at the mouse pointer. For example, when a user touches the screen and accidentally touches the screen with the sleeve at the same time, the mouse pointer will not be at the position where the finger touches the point. This problem is not a drift phenomenon.

Reason analysis: This phenomenon may be caused by the following situations

○a. Touch screen driver installation error.

○b. The computer installs multiple touch drivers of different brands, and the software conflicts.

○b. The operating system of the computer fails.

○e. The interface (USB or serial port) of the computer host fails.

○f. The touch screen signal cable (USB cable or serial cable) is faulty.

Solution: 

○a. Refer to the touch screen driver installation guide and reinstall the driver.

○b. After uninstalling all the drivers in the computer, reinstall the touch screen driver.

○c. Contact the maintenance personnel of the computer to solve the problem.

○d. Contact the company's after-sales maintenance personnel or the company's local authorized dealer.

Reason analysis: Make sure that the system installed on the computer is a version above WIN7 Home Premium (including this version), XP cannot be multi-point application

Solution: Install WIN7 Home Premium, Professional Edition, Ultimate Edition