Re: [HOWTO] Convert da Vinci Mini to RAMPS 1.4
First of all no need to apologize !! Humans make mistake that is one way we learn.
I have been an electronics tech for over ten years AND STILL MAKE STUPID MISTAKES FROM TIME TO TIME.
my LCD only works when powered over usb.
So sounds like it is working
IMHO the first step of setting up a new machine is setting it up with the computer
I use repiter host but the are other programs like pronterface.
This will allow to troubleshoot end stops , move and home axis one by one level the bed etc . Much easier than the lcd. The lcd is fine for running prints and minor tuning . Also if chitcat is set up you can change firmware setting through your host software.
Your stock ends tops may of may not be compatible with ramps. . or you may need to switch wiring. Or you may just have to flip you logic in firmware.
So set up ramps on your computer
send the m119 command to the board and read endstop states.
trigger the stops one by one and resent the command after the trigger and see if thinks change actually faster to do than explain.
hope this helps.
Based on what you have told us something may be shorted out . If you added a diode they do have polarity it could be in backwards.
The good thing is ramps and arduinos are cheap enough you can always buy a new set and start from scratch.
Hope this helps.
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura