The Touchscreen flashes as in this video.
The Touchscreen might be malfunctioning.
Order a new Touchscreen from our official store and replace the damaged one.
https://us.snapmaker.com/products/touchscreen-for-snapmaker-2-0?_pos=1&_psq=touchscreen&_ss=e&_v=1.0
If you need further assistant, kindly submit a support ticket through https://snapmaker.formcrafts.com/support-ticket
Our dedicated support team will be more than willing to assist you in resolving the issue.