I have a similar problem. I built a Mendel Prusa and it has worked well for over a year. I then had a problem with the Ramps Shield. The Power Supply connector lifted a trace at the 4 position input connector. No problem, I replaced the board and remounted everything. In the process of re-assembly I miss oriented one of the step sticks (w heatsinks) and decided to replace all of them for good meaby rspehr - General
This is my first Mendel Prusa V2 build. When I tried to power up the new printer assembly smoke came of of the Mega 2560 board. I checked the Voltage from the ATX Supply and I am reading 13.4DC comming from each set of wire leading from the Power Supply. Any suggestions would be appreciated. I am including an image of the part that burned.by rspehr - General Mendel Topics