A link to a video as you connect your tablet to your computer and make sure to capture your cable connections, and as you turn your tablet on. Please send the video through WeTransfer or upload it to Dropbox or Google Drive and make sure you remove the restrictions if you upload it so anyone who has the link will be able to access to you video.
Hi jul oved, kindly try the steps in these articles: What to Do If Your Huion Pen Display Shows A Black Screen or No Signal and How to fix my Kamvas 13 no signal black screen problem?. If your issue persists, it is possible that there may be a problem with your cable, your tablet, or your computer compatibility. Thus, kindly send the following information to service@huion.com to be assisted further:
Best Regards,
HUION Customer Support