Quote
Perryrussell
Shouldn't the lcd show 0 c for temp if they are unplugged?
ERR: mintemp
That should display if thermistors are not connected.
Room temperature, if connected properly.
You might have bad RAMPS. Maybe soldering or something.
4988 will work. just get some heat sinks and 2X40mm fans to cool the whole RAMPS board.
Those two brown poly fuses will trip and kill your print unless they are cooled. 4988 likes to be cooled also, or it will go to a thermal shutdown and you will skip steps.
Just zip tie them to the wires pointing to RAMPS and then print this from toolson.