I see you made this post in 2019 and this is December 2020 and mine is 37 days old and I’ve used it about four times and it’s doing the exact same thing except for the power button at the top if you touch it it resets
Sandy: Get a replacement
From experience (owning 2 devices and having gone through ~4 replacements) there are multiple causes for this issue.
The intel display sleep is the easiest to fix, if your computer freezes and the keys: Win+Ctrl+Shift+B , resets the display and it works again, your problem is the intel display problem
but there are multiple other causes for freezing that is not fixed by the win/ctrl/shift/b these are not fixable and need a replacement device. they are potentially related to heat. These can be freezes or Blue screen (BSOD). If this is you then get a replacement asap.