@flashmanrpr Please download the firmware here：https://www.creality.com/download
and flash the firmware as the following tutorial
Mainboard firmware flash tutorial: https://www.youtube.com/watch?v=AKIfwPgN0qs&feature=youtu.be
Screen Firmware Flash Tutorial: https://www.youtube.com/watch?v=Jswzrh2_ekk
Got the same problem with my new CR6SE which stucked at boot too after 3 days.
I can't reflash it, because... it's stucked at boot!
The link you gave is for the ender, the software is different for the CR
Do you know a different way?
Or should i send it back in warranty?