Dell one 2330 turn off computer but leave the display on

Hi Keith,

There are three buttons above the power button on the Dell One 2330. Press the button on the bottom to display the display input menu. Then press the top or middle button to move the selector up or down to choose the VGA option so that you can use it has a external display.

The only way that's possible is to take off the laptop monitor and install this http://www.ebay.com/itm/HDMI-VGA-DVI-Audio-LCD-controller-board-for-lcd-panel-DIY-LCD-monitor-/170901386781

I dont think any of you got my point. Mac mini is a little box computer that need a display to work. I dont have any external displays. I am using Dell one 2330 as the display for the mac since it supports HDMI in.

I want to turn off the computer but not the Dell one 2330 display (so I can still use it to work with the Mac). I know that you can switch input source from the side button but there is no way to leave the HDMI video in and just shutdown Windows computer.

Hope this clarifies my question. 

No you can't do that. When the computer is off there is no power to the internal display or anything else in the computer. The display is controlled by the video card in the computer and cannot use the mac mini video controller. You could use a desktop monitor or a big smart tv, but the all in one is more like a laptop and the screen is part of the computer. If the computer is turned off the screen doesn't work.

Read http://www.apple.com/mac-mini/features.html#thunderbolt