Just to clarify - the polyfuses used on RAMPS will open up only for as long as an over-current condition is present. They will automatically reset back to being low resistance when over-current...
Type: Posts; User: printbus
Just to clarify - the polyfuses used on RAMPS will open up only for as long as an over-current condition is present. They will automatically reset back to being low resistance when over-current...
Have you been able to determine whether 12V is getting to anything else on the RAMPS board? The diode D1 possibility assumes it is. There are other possibilities if 12V isn't getting onto RAMPS. ...
Does the electronics stay on if you power it through USB and also turn on the 12V power supply? If so, can you get any motor or heater activity out of the printer that way? That would help prove...