The screen off mode seems to work on mine, but I'll try the power button also. With screen off mode the screen does look white. If I just close the cover at night, I'll lose 2% of the battery overnight. That's why I was thinking an update might help, since it's a small percentage. So far the invert mode hasn't helped, but since I'm just closing it with the cover. I'm still losing 2% overnight.
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