The RAMPS shield burned up because the $20 knockoff shields don't use sufficient connectors or copper weight on their boards. We see this quite often in #repra

The RAMPS shield burned up because the $20 knockoff shields don't use sufficient connectors or copper weight on their boards. We see this quite often in #reprap and I always advise people not go cheap on the board. Ultimachine ramps cost a lot more for a reason...they don't catch fire...and if there was any issues johhnyr would make it right.