I have a prusa i3 with RAMPS 1.4 running Marlin firmware. The RAMPS board is connected to a Raspberry pi running octoprint and is powered by an ATX PSU. The PSU is connected to a relay which the raspberry pi is able to switch on and off; however, i want to completly cut all power to the printer without disconecting it from my raspberry pi. The raspberry pi would allways remain on and be able to connect the printer when its needed. I thought about using a similar setup with a USB cord to shut of the +5v wire but that seems like it would be a terrible idea. If this is not possible i would at least like to be able to turn off the LCD in marlin so that the printer "appears" off. Any suggestions?
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