Hey,
I have the same problem! My screen is frozen but it is white and I cannot remember I switched it of and it has no powersafe-mode. When I did what Booxtor was suggesting, the blue light went off after 10sec or so? Does it mean my screen is broken? How could this happen?
I have a very important exam this friday and do not have the files on the boox M92 saved anywhere else. How can I get hold of them?
I would be very very pleased and happy for help!