First, I would turn everything off, disconnect them from the power strip, plug them directly into the wall outlet and retest.

I plugged the monitor into the wall and powered it on. It went into power save mode as expected.

I also cleaned the power strip sockets with compressed air, plugged everything back in, powered on the monitor, and it went into power save mode as expected. When the PC was turned on, the screen behaved as expected.

While this is promising, I won't be convinced until I try again after letting the monitor sit all night with the power strip turned off (as this was the way I had been doing it for a long time).

I will report back tomorrow morning.

I did it again. After I turned on the power strip, I pressed the monitor power button and it started blinking white, and did not wake up until the log in screen. It almost seems like time is a factor.

Any other ideas?

One more update:

I left the monitor plugged into the wall overnight. In the morning I pressed the power button and the button started blinking white. After about 5 minutes or so, it turned orange.

However, when I turned on the PC the button started blinking white again, and the didn't wake up until the login screen

Also, the monitor menu button does not work while the power light is blinking white.

Is there something in the monitor that would do this?

It could be that the 8 year old monitor is intermittently failing. The only other testing I know is to use it with a different computer to verify the issue follows the monitor.

My monitor is 2 years old - not 8.

I left it plugged into a wall socket and in powersave mode overnight, when I turned on the computer, it started blinking again and didn't come on until log in screen.

I don't have a spare PC to test it with - but why would the connection to the PC have anything to do with waking up from powersave mode?

8 years old as in the release date of this monitor model. Not from when you actually bought it. A monitor does not control when it wakes up. The PC controls the signal going to a monitor.

Fair enough on the age.

But still, even when the PC is off and the monitor is powered on, the white light blinks instead of going into power save mode. That must be an indication of something related to the monitor right...? Unless you are confirming for me that that is normal operating procedure for the monitor?

Turn the monitor off. Disconnect all video cables from the monitor. Turn the monitor on. The power LED should be solid white. If not, it could be faulty.