Please try connecting to another USB port on your computer or replace the USB cable if you have a spare one. If you are using a desktop computer, it is better to plug it into the computer's rear USB port. Otherwise, you must first try connecting to another USB port or replace the USB cable. Thus, the issue is caused by other factors. If the light is on, it means that the connection of the tablet, USB cable, and the power supply of the computer's USB port is normal. Touch the pen on the tablet's surface and check whether the pen indicator on the tablet will light up. If the two methods above don't work, please try these steps: NOTE: Make sure that your tablet is not connected to your computer, your antivirus is turned off and all your drawing programs are closed when installing the driver. On how to install the driver properly on Windows, please check How to Install Huion Drivers on Windows. On how to install the driver properly on Mac, please check the article on How to Install Huion Driver on MacOS. You can visit our official website ( ) to download the corresponding driver for your graphic tablet and reinstall the driver. If the hardware has no problem, please check if you have installed the driver correctly. If the cursor works normally, that means the hardware has no problem. Please check if the cursor is working properly without the driver installed. Uninstall old drivers and all other tablet drivers, whether from Huion or other brands. For windows, please check Three Methods to Uninstall Huion Drivers from Windows 7 to uninstall the driver properly, and for Mac, please check How to Uninstall the HUION MAC Driver V13 or V14 Properly. For Version 15 drivers, you can find it at Settings (gear icon) > General tab. For Version 14 drivers, you can find it at the bottom area of the "About" tab. 
Or click "Administrator Privileges" on the driver panel.For Windows system users, first, run with administrator privileges and restart the driver software.
The computer system lacks certain components.The USB cable or the computer's USB port is damaged or loose.This issue may be caused by either of the following reasons: Encountered a Device d isconnected problem when using Huion products but don't know how to fix it? Don't worry! This tutorial will help you.
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