I have owned an Acer Chromebook 14 for a few weeks now, but since about a week it does the following:
1. I am typing text and suddenly the screen blanks out
2. Audio/video keeps paying in the background normally, and also keyboard entry is captured normally, but does not turn on the screen
3. Sliding over the trackpad sometimes turns the screen back on, but sometimes I also need to close the lid and open it to turn the screen back on
4. While the screen is blank I can see that the backlight remains on
Since using the trackpad to move the mouse pointer turns on the screen again, I don't think that this is a hw error? Also this seems to have started to occur with the update to Chrome OS 54.0.2840.79 (Official Build) (64-bit). Prior to this release my Chromebook did not do this.
Are others seeing the same behaviour, or is this still some kind of HW problem and should I return my Chromebook under warranty?