Is there a quick keyboard shortcut to turn off your monitor?

There's not a shortcut key or hotkey, but simply create a desktop shortcut and use the command below as the target, name it "Turn Off Screen" or something like that, and you're done! It's a script that runs in PowerShell that invokes the command to turn off your display. Just double-click the shortcut to turn screens off without locking the PC, same effect as when they are turned off with your power settings.

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -command "(Add-Type -MemberDefinition '[DllImport("user32.dll")] public static extern int PostMessage(int a, int b, int c, int d);' -Name f -PassThru)::PostMessage(-1, 0x112, 0xF170, 2)"

This turned off my 2 displays but also put my laptop to sleep.

My monitors continue to burn energy, though. At this point, I have the monitors set for 15 minutes before they go off. Then, when I know that I am going to walk a way for a while (lunch, etc), I go into Power/Sleep and change the setting to 2 minutes to turn the monitors off. I always leave Sleep to "Never" since I typically run processes in the background. I was just hoping that there was a quicker way for me to turn off the monitors. Hmmm... I guess that I can just hit the Power buttons on the monitors. Not as convenient as a shortcut key, but definitely better than changing the Power/Sleep settings.

Thank you.

create a shortcut on your desktop (or wherever you want) with this command:
powershell (Add-Type '[DllImport("user32.dll")]public static extern int PostMessage(int h,int m,int w,int l);' -Name a -Pas)::PostMessage(-1,0x0112,0xF170,2)

My monitors continue to burn energy, though. At this point, I have the monitors set for 15 minutes before they go off. Then, when I know that I am going to walk a way for a while (lunch, etc), I go into Power/Sleep and change the setting to 2 minutes to turn the monitors off. I always leave Sleep to "Never" since I typically run processes in the background. I was just hoping that there was a quicker way for me to turn off the monitors. Hmmm... I guess that I can just hit the Power buttons on the monitors. Not as convenient as a shortcut key, but definitely better than changing the Power/Sleep settings.

Thank you.

To help put your mind at ease, the amount of energy your monitors are using is such a significantly small amount, that even if you left them running 24/7 for an entire month, assuming they are pulling a constant 60 watts, or 120 watts combined, after 31 days that will come out to 89.28 kWh. And at a rate of $0.30 per kWh (US dollar), that comes to a total of $26.78. So that's $26.78 to run both monitors IF you have them running non-stop, for an entire month. That 15 mins you're talking about comes out to an even less significant amount. Let's assume that there are 4 times a day where you get up from your computer and your monitors stay on for 15 mins before they turn off. That comes out to 1 hour of unnecessary monitor runtime every day. If you consider that, then your monitors are wasting 3.72 kWh of energy every 31 days, or at a rate of $0.30 per kWh (US dollar), that comes to $1.12 per month that you're wasting.

And it's very likely your monitors are using less than 120 watts combined. Your computer is using significantly more power than your monitors. Your monitor energy use doesn't even matter.

Having said that, there are situations where it would matter, and that's if you have OLED monitors, which are very susceptible to burn-in. In that case, it matters because your are shaving usable life off of your monitor by risking burn in if you don't take steps to mitigate that, including turning them off immediately when not in use. Having said that, I'd love to be able to hit a key and turn off my monitors as well, but my reason is because I have a couple of QD-OLED displays.

Yea. There is. I use HP laptop and I used to use that hot key combination a lot. But now I forgot and can’t recall after I tried very hard. The hot key combo kept my laptop downloading while the monitor was off. Please someone remind me too.