Hi jan son, I'm sorry to inform you that your Galaxy A70's USB-C port is only a USB-C 2.0 with OTG. It doesn't have the USB-C 3.0 with Display Port capability. This is why you are getting the "No signal" issue with your tablet. Here is the list of compatible Samsung devices: List of Compatible Devices Support USB-C to USB-C Connection with Huion Displays.
嗨 jan son,我很抱歉地通知你,你的Galaxy A70的USB-c端口只是一个带OTG的USB-C2.0。 它没有带显示端口功能的USB-C3.0。 这就是为什么您的平板电脑会出现"无信号"问题。 以下是兼容的三星设备列表:兼容设备列表支持Usb-C到Usb-C连接Huion显示器。
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Hi jan son, I'm sorry to inform you that your Galaxy A70's USB-C port is only a USB-C 2.0 with OTG. It doesn't have the USB-C 3.0 with Display Port capability. This is why you are getting the "No signal" issue with your tablet. Here is the list of compatible Samsung devices: List of Compatible Devices Support USB-C to USB-C Connection with Huion Displays.
Best Regards,
HUION Customer Support