1. Touch Screen Click Accuracy Decreases [Fault Phenomenon]
A touch screen has decreased click accuracy, making it difficult to position the cursor.
[Fault Analysis and Handling]
1) Run the touch screen calibration program.
2) If it is a newly purchased touch screen, try uninstalling the driver, then power off the main unit for 5 seconds and turn it back on to reinstall the driver.
2. Touch Screen Cannot Be Calibrated [Fault Analysis and Handling]
1) It may be that the touch screen control card received an operation signal before the main unit loaded the touch screen driver. Please power off and restart the computer and recalibrate.
2) There may be an abnormal installation of the touch screen driver. Please uninstall and reinstall the driver (remove it from the Control Panel’s Add/Remove Programs).
3. Cursor Stays at a Point on the Touch Screen [Fault Analysis and Handling]
This situation occurs because the touch area of the resistive screen (the surface of the resistive screen is divided into touch and non-touch areas; clicking on the non-touch area has no response) is pressed by the monitor casing or cabinet casing, equivalent to being touched at a point continuously. If the cabinet casing presses the touch area, you can increase the distance between the cabinet and the monitor screen. If the monitor casing presses the touch area, you can try loosening the screws of the monitor casing a bit.
4. Touch Screen Works Unstable [Fault Phenomenon]
A touch screen works very unstably, sometimes responding normally, and sometimes not responding at all.
[Fault Analysis and Handling]
For this phenomenon, focus on checking whether the connection interfaces are loose and whether there are conflicts in the serial port and interrupt number.
5. Screen Darkens [Fault Phenomenon]
A touch screen has a darkened screen with abnormal color display, but the operation is fine.
[Fault Analysis and Handling]
This situation may be caused by incorrect color mode settings in the Windows 2000 system operation, or due to overly tight screws during the installation of the touch screen causing poor screen release. In IT120, if a PS2 mouse or keyboard is plugged in, it may also cause the screen to darken and not display normal colors.
Handling Methods:
1) Right-click on the desktop, select Properties, go to Settings – Advanced window, select the S3Gamma plus tab, and then adjust the colors.
2) Open the cabinet, loosen the screws of the touch screen to see if normal colors are restored, and adjust the tightness appropriately.
3) Replace the PS2 mouse or keyboard with USB interface mouse and keyboard.
6. Touch Screen Does Not Display [Fault Phenomenon]
A touch screen powers on normally, but there is no display.
[Fault Analysis and Handling]
This phenomenon may be due to poor connection of the screen wiring. If it is an all-in-one machine, it may be that the wiring inside the touch screen is loose or damaged. You can check whether the screen wiring is completely connected. If it is connected properly and the screen still does not display, it indicates a fault in the screen.
7. Alarm Appears on Startup [Fault Phenomenon]
An alarm occurs when starting up, and the machine cannot start normally.
[Fault Analysis and Handling]
This situation may be due to the memory or graphics card not being properly inserted or damaged. Most of the time, it is because the memory is not properly inserted. You can reinsert the memory for testing and perform replacement tests on the memory and graphics card to determine which aspect has the problem and then replace it.
8. Screen Displays Artifacts [Fault Phenomenon]
After powering on, the screen shows artifacts, but the machine can be used normally.
[Fault Analysis and Handling]
This situation may be caused by loose connections between the screen and the motherboard. You can check if the connections are secure and correctly plugged in. If problems persist, you may need to return it for repair.
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