Does the touch function suddenly stop working when you use the touch monitor or laptop? Are you experiencing problems such as the touch screen not responding, touch screen input being offset or writing is intermittent? Let's troubleshoot these common touch problems and fix them pronto!
1. Check the hardware─ connectors and wiring
If the external monitor cannot operate the touch function properly, the most common hardware problems are as follows:
If you encounter touch problems, please first check that the hardware connection is correct (the screen of the touch screen laptop is integrated all-in-one, and the wiring is inside the case). Usually, it is not necessary to check hardware connection problems. You can skip to the next part for software settings).
Poor contact of the USB connector
External touch monitors usually use the USB interface to transmit touch signals. If the USB connectors on either side of the computer or touch monitor are faulty, with solder pins stripped, the tongue of the pin loose, etc., the touch may be intermittent, unusable, or the screen may not light up at all.
Disconnected, incorrectly connected or faulty cables
This is more likely to happen if you plug and unplug the cables frequently. Please re-insert the cables to ensure they are in the correct sockets and that the plugs are not wobbly or loose. If the touchscreen still does not work, try purchasing a new cable from the original manufacturer!
Cleaning the screen from dirt and dust
Grease and dust can potentially cause poor electrical sensing on touch surfaces. Use a lens cloth to gently wipe the touch screen, using a little water for stubborn stains. Do not use excessive amounts of water or detergent.
2. Check the Software Settings
─ Unresponsive Touch
If touch no longer works, check that Windows Update and the BIOS are updated to the latest version. If it still does not work, follow the steps below to troubleshoot any problems!
Update the USB Driver
If the USB driver on Windows 10 is not successfully updated, not only the external touch screen cannot be activated, but other USB devices may encounter problems. Right click [Start] → [Device Manager] → [Universal Serial Bus controllers], you can select [Update driver] directly or select [Uninstall device] and then restart the computer. Windows will automatically install the driver after rebooting.
Update the "Human Interface Devices" Driver
Connect the monitor to the computer and go to [Device Manager] → [Human Interface Device]. If the touch panel is connected successfully, the touch panel appears in the Human Interface Device list. Right-click the touch panel and follow the steps to update the driver.
* If you can't find the touchscreen device in the Human Interface Devices, try enabling "Show hidden devices" in the View preferences.
Setting the computer to recognise the touch screen
Click [Start] → [Control Panel] → [Tablet PC Settings], and then click [Setup] under the Display tab. When "Tap this screen with a single finger to identify it as a touch screen" appears on the screen, simply touch the screen.
3. Software Setting ─ Calibrate Touch Input When the Touch Screen Input is Offset
Step 1. Check the resolution setting
If the resolution setting does not match the screen, the touch position will also be affected. For example, if you touch certain areas of the screen, the screen will respond to the correct points, but clicking on other areas may activate other areas next to them instead.
When the cursor is on the desktop, right-click for the setting menu → click [Display Settings] → select the touch panel (number 2 screen) and select the appropriate resolution (for example, On-Lap M505T resolution is 1920x1080), then click "Apply".
Step 2. Calibrate touch input
Click [Start] → [Control Panel] → [Tablet PC Settings] or search for [Calibrate screen for pen or touch input]. Open [Tablet PC Settings] and select your external monitor from the Display drop-down menu → Click [Calibrate] → Tap the crosshair each time it appears on the screen. → Click "Yes" to save the calibration data.
4. If the stylus does not work or is not sensitive
Touch screen laptops and smartphones usually require a dedicated stylus. For the On-Lap range of touch screens, you can choose a passive stylus with a conductive rubber or plastic disc over 6mm in diameter. The induction of active pens varies from brand to brand. If your writing or drawing is intermittent, it is recommended to use a stylus with stronger induction (e.g. Adonit Dash3).
5. Confirm the Main Device Supports External Touch Screen
iMac or MacBook
The Mac OS system does not support external touch signals, and the touch panel can only display images when it is connected to the computer. This is a limitation of operating system compatibility. If you need an external touch monitor for your Mac, you can use BootCamp, a multi-boot utility that comes with Mac OS. It helps you install Windows 10 on Intel-based Mac computers. When you switch your MacBook to Windows 10, you can use the external touch monitor!
Learn how to install Windows 10 on Mac :
Android Smartphone
When you connect the M505T 15.6" on-lap touch monitor to an Android phone that supports USB Type-C DP Alt, the M505T can receive touch, video and audio signals simultaneously. However, if the Android phone OS has not been updated to Android 8.0 or higher, you will not be able to use the touch function on the M505T touch monitor.
Attention! Not every smartphone with a USB-C port can be connected to a touchscreen. You will need to check with your smartphone manufacturer to see if the model supports DisplayPort Alt mode for video output.
6. Eliminate environmental noise ─ flicker or ghost clicks
As the projected capacitive touch technology is sensitive to current differences, electromagnetic interference or unstable power supply can cause touch ghost clicks - the screen responds to touches you don't make. In this case, please eliminate the following interference from your environment:
Unstable power
Power outlets in public places usually have complicated wiring and power acceptance, and you may occasionally experience power fluctuations. If the power to the touch monitor comes from these outlets or extension cords, you may experience problems that prevent you from operating the touch monitor normally.
High power appliances
Please try to stay away from kitchen appliances in use, such as electric cookers, microwave ovens, etc. Even table lamps can emit a lot of low-frequency electromagnetic waves. These electrical appliances, which emit electromagnetic interference when in use, may affect the use of your touch screen.
We hope the article has helped you to solve the problems of using touch monitors. If you have any other questions about touch screens, please write to ICI Touch Tech Customer Service.
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