Reply #14: I sincerely doubt it's anything as easy as a cold solder

[Warpy]

connection at the button. It's much more likely a failed part internally. The on/off flashing signaled it was sick. Now that it's pretty much off all the time means it's finally dead.

Replace it. You just had the bad luck to get a monitor with a borderline part somewhere in it. If you take it to a recycling center, it might end up in the hands of someone who can fix it and sell it instead of a landfill, probably by salvaging the screen and stuffing all new electronics into it.

And that's really the best you can do at this point.