Heated bed reads as -15 on the touch screen, there is a red led light (D2) shining on the mosfet and on the electronic board. Chaning the temperature on the touch screen does nothing. Rechecked all the wiring could not find anything wrong with the connections.
The servo that switches between the hotends is not working, the initial press of button 3 worked and then the switch to hotend 2 by pressing button 2 worked, but now it is not working, pressing button 1 and 3 does nothing and button 2 makes a buzzing noise.
Hotend 2 does not heat up, when trying to change the temperature of hotend 2 nothing on the touch screen works anymore, motion checks no longer work etc. I have to switch the printer off and then on again for anything else to work again.
The extruder for hotend 1 is also not working, nothing happens when trying to extrude. The green light of the filament sensor is working but the extruder motor does not work.
I have rechecked all the wiring an can't find anything wrong.
now it won't evenupload to the board
ok so if i'm getting no temp readings at all what would anybody suggest?
to fix the -15 reverse the connector for the thermistor. my second hotend had the same issue and this fixed it.
i have found when the printer is connected to a computer the touchscreen generally works for a limited time before freezing. also try using the Home All before trying to do anything.
check whether the second extruder is working by switching connections with the first extruder and see if the second one works connected there. that will rule out a bad wire, connector, or motor. first try it at the motor. if it works put connect them back correctly, then switch at the board. this will give you a focus for further investigation
@Rene Janeke The connection to the thermistor head end is dodgy unfortunately (at the black sleeve), they'll need to be replaced or if you're inclined repaired (beware, that's all heat shrink so it's a pain to tear back). @fg beware you may find your thermistor fails at some point soon.