DIY Energy Efficient Steampunk Computer as Powerful as a MacBook Pro
technicallywizardry.com
technicallywizardry.com
I don’t think that’s an issue with that monitor model.
https://www.cnet.com/products/lg-ultrafine-27md5ka-lcd-monit... says it has sleep and standby modes, and uses 1,2W in them.
So, I would think that unit is broken, or the PC it was connected to didn’t make it sleep.
Also, https://ec.europa.eu/info/energy-climate-change-environment/...:
”A wide range of equipment – computers, TVs, audio and video equipment, dishwashers, microwave ovens, and electric toys – can have standby and off modes.
Since 2009 these devices are required to switch into a low power mode (such as standby) after a reasonable amount of time
Since 2013, they must not consume more than 0.5 Watts in standby or in off mode”
So, it seems this monitor can’t be sold in the EU.