I wish I could just leave it on! That is the best way. But at this
point, it won't turn on even one time! I thought If I can figure out
how to open the back, I would clean the contact, assuming it is dirty,
then reassemble, and leave it on as you suggest...

Press really hard on the right-most button at the bottom ... what have you
got to lose?

If you have already tried this, then your problem is different than mine.

Darned shame ... a wonderful monitor with crappy buttons!

Oh, by the way, your power supply might have died.