Why the touch is not working when connecting touch USB cable to HDMI 1 under VGA?

04-07-2020

If the signal input is under HDMI 1, please connect the USB touch cable to TOUCH-USB1. If the signal input is under HDMI 2, please connect the USB touch cable to TOUCH-USB2. If the signal input is under HDMI 3, please connect the USB touch cable to TOUCH-USB3. If the signal input is under HDMI 4(MHL) or VGA, please connect the USB touch cable to TOUCH-USB4.

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