I don't know what you mean, we have 2 LG 24" monitors, 2 x Samsung 23" monitors and a Samsung 19" one and the all have LED's on the front and these flash and a darkened room you still clearly see that the monitor is powered as the screen back light is on and is visible as a grey screen, not visible in a lit room but at night time it plainly visible if the lights are off. This means that they are drawing power and not only wasting valuable screen use hours but are also a possible fire hazard to say the least.
I'll ask you again, why do you assume other monitors are not drawing power when you "switch them off" with power button. There is no hard power switch, they are always in standby regardless if LED is blinking or not. It might be just they draw less power when you "switch them off", but not guaranteed. And for some stupid reason assume this monitor is not drawing power without video signal present?
back light is on and is visible as a grey screen, not visible in a lit room but at night time it plainly visible if the lights are off.
Any monitor switches off backlight when no video signal is present.
Yes I do know that just because the monitor has been switched OFF via the button on the front that it is still drawing some power, but that level of power being used is much less and so is any risk associated with it.
No, not every monitor nor TV for that matter switches of the back light when the video signal switches off. What happens is that the pixels are effectively switched off because the polarising action ceases as the transistors are no longer getting instructions to rapidly switch on and off according to whether the pixel should a bright light source of a dim one etc, they go to their resting state which assumes that they are supposed to be blocking the transmission of the light from the back light through to front of the screen.
This is why the back light can be seen most clearly in a blacked room when the monitor or TV is still switched on but not getting a video signal, its looks like a dull grey screen and switching the display OFF you will see the screen going really black.
If you have satellite or cable TV, try turning off the receiver box at night with the lights off and watch the screen, then watch again as you operate the switch to put the display into standby mode, it really is very clearly visible.
I have also double checked this with a power meter, with a video signal, the display will draw its maximum power, disconnect or switch off the source of that video signal, the power consumption of the display unit will drop again, use the TV remote, or the touch switch/pad on the monitor and you will this power consumption drop yet again as display circuits and back light LED's are switched off, the unit should now only be drawing 1 or 2 watts in standby mode ready to come again when you operate the on control be it directly on the monitor or infra red via the TV remote.
As you rightly pointed out, there is no actual physical power button any more.
In the case of the Crossover monitor, if I switch it on without a video signal being present, then after a couple of seconds, it switches off again. Give it a video signal and switch it on, it will remain on as long as the video signal is present. Remove the video signal, the monitor switches off. Reinstate the video signal and the Crossover remains off until I press the wake up button, so the video signal does actually switch off the monitor into standby mode.
The Samsung and LG monitors and TV's will spring back to live instantly again as soon the video source is made available.
Physically check it and see.