Samsung 2043BWX Monitor: Power Saver Mode
 

My monitor has behaved well for several years. Now it has begun going into power saver mode (blinking power-on light), whether the computer is powered up or not. It requires about 3 minutes before it will display an image.

Touching the "Source" button or the "Auto" button, as suggested on an old Samsung Q&A, has no effect.

Why now, after all this time? Could the RGB cable be the problem? Yes, connections are tight.

Any ideas?