One more for your collection of info: sometimes I can type in my password “blind,” and it will, after anything from 10 to 90 seconds, light up the screen. Not the whole screen at first, just the progress bar, but then it all shows up...Thank you for the information. I had this problem and thought it was the monitor, since it was always the same monitor affected, and changing connection type (VGA, DisplayPort, HDMI) made no difference. FileVault is not in use. I look forward to your investigatory results.