I am not sure if the issue of the screen power turning off and having to reboot is similar to the occasional problem I have.
My screen will go black once in a while and will not come on. I can hold the Wizard screen at an angle to an external light source so that I can see the screen display enough to go to the settings menu. When I navigated to the backlight settings, I noticed that the power saving setting was slid all the way to the left which made the screen black. I used the stylus to move it up a couple of notches and it started working properly. So you may want to see if that is a possible issue.
I have no idea why it occasionally does this, but mine does and just changing the display power saving settings seems to keep it working for a period of time. But it eventually seems to slip back to the lowest power saving setting on its own once in a while.