You can set a sleep schedule for your DAKboard Wall Display (and a DAKboard CPU) to turn on and off at designated times.
Note: to access the display settings, you'll need to be on the same wifi network as your display/CPU.
Next, scroll down to the Screen section and find the "Sleep Schedule" off/on times:
Select the desired off and on times for your display, then click the "Save changes" button at the bottom. Your display will now turn off and back on at the set times.