I got the “mostly printed cnc parts bundle,” along with the “full graphic smart controller” from here, and was able to get my cnc up and running with Repetier host. However, I was unable to get the controller working. It would light up, but the screen was blank. I tried adjusting the contrast pot, but that made no difference.
It was suggested that I should try switching the wires. When I did that and powered it back up, something definitely got fried on my ramps board - there was smoke and I could smell something burning. Now, I can no longer control my cnc with Repetier host, and the led on the ramps board doesn’t light up either. The controller also doesn’t light up anymore when the ramps board is plugged in, though it does still light up (with a blank screen) when the arduino is plugged into my computer.
I’m pretty sure that the ramps is toast, but any idea on how I might get the display on the controller working? I’ve included pictures of how I connected everything the first time, when the display lit up but the screen was blank. Let me know if different/more specific pictures would be helpful.