I have this monitor plugged in to a Dell Inspiron 537 i7 with windows 10. Everything has been fine since I bought this setup, but now something is happening with the monitor.

When I press the power button on the monitor after the computer has been off overnight, the power light initially turns white, but then starts to blink white instead of going in to power save mode (orange). Then when I boot the computer, the monitor stays black (still blinking) until the windows login screen wakes it up, and then everything is fine. 

Here is the sequence i experienced:

1. Power down the computer
2. Monitor goes into power save mode (orange)
3. Turn off the monitor (power light is off)
4. Turn off the power strip to everything (I was doing this when everything worked fine)
5. ...overnight...
6. Turn on the power strip
7. Turn on the monitor (power button is white)
8. Power button then blinks white instead of going orange. (it used to go orange I think)
9. Turn on the computer
10. Screen remains black until the windows login kicks it on.

The monitor passes self test just fine and otherwise works fine.

Any ideas what could be going on?

P.S. I just tried the same sequence, but only left the power strip off for about 5 minutes. When I powered on the monitor this time it went into power save mode as I would expect it to.