everything leads back to the mpu (atmel 644p or 1284p) this what is most likely damaged
Can you replace it, yes, if you can do SMD rework (that's soldering with hot air)
If your eyes are failing and you cant hold your hands still any more... then no you can't.
you haven't said what pins are connected... just which plugs
the hotend connector has two pins
+12v and a gnd that is switched via a mosfet
the thermistor connector has two pins
signal going to the mpu and gnd
so if the hotend is on there is normally a connection from the switched gnd and thermistor gnd.
Edited 1 time(s). Last edit at 01/24/2019 08:36PM by Dust.