Display/monitor power off instead of going into standby

I recently acquired a 27" display to use as a 2nd monitor with my Acer laptop.
It's an LG model 27MP57HT-P.
Full HD 1920x1080 resolution.

Hooked it up to the laptop via HDMI.
What soon started bugging me was that whenever it lost video input, e.g.
- laptop turning off all displays for power saving reason
- laptop going into standby
- laptop powered off
- rebooting and messing with the BIOS

the monitor turned off. As in powered off. The message on the screen was
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No Signal
Please check your connection
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followed by

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Power is off in 10 seconds to save energy
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And then it powers off. The white power LED stays off.
Meaning I needed to use the power-button/menu-joystick to power it on again.
This got pretty tedious.
And I didn't trust that power button to survive multiple uses every day for many years.

So I thought this can't be.
Looked around on the web,
couldn't find anything specific but some people suggested switching HDMI cables might help.
 
So I swapped in a different HDMI cable between my laptop and the monitor.

And who would have thought...it works now !

When it doesn't see any video signal now it says on the screen
------------------------------------------------
No Signal
Entering the power saving mode shortly.
------------------------------------------------
and then it enters standby.
The white power LED blinks.
And once it sees a video signal again it comes on
and the picture is there within a few seconds.

While I am certain there is no difference in video signal quality between different HDMI cables,
I have seen issues in the past related to signaling.
I remember trying to connect an AppleTV device a while back,
it didn't work on our TV with the cable it came with,
but a different cable worked.

So, if you hooked up your display/monitor via HDMI
and it powers off instead of going into standby,
try a different HDMI cable !