So I'm not even sure where to start. One of my Robo R1 Plus running off a 1.4 graphic smart display. It keeps failing after an hour or two. The printer is just sitting there and the screen says waiting to heat. Temperatures on the display are where they left off, but there really isn't any heat at all. I'm not sure what to test; I think I'm going to start a print from my computer and see what that does. From what I see, it could be the graphics display, a loose connection, a bad temperature reading, my ramps board, I just don't know. Anyone experienced this?