I just got my HICTOP Prusa i3 Aluminium frame printer and finished putting it together. After setting it to preheat, I realized the bed was not level - I adjusted it and accidentally caused the head to crash into the bed.

It sounded like something popped, and the printer restarted. It is now showing a MINTEMP error message, and both bed and hotend temperatures read 0°C.

The only visible damage is that a thin layer came off the printbed - After testing with a multimeter, I realized that the metal under this layer is connected to power. As both the bed and hotend were heating, I believe I may have caused a short.

Replacing the thermistor on the hotend with a spare did not solve the issue. I tested the thermistor on the printbed with a multimeter, and it seems to be working correctly (resistance value around ~200 kΩ at room temperature).

Which leads me to believe that I may have damaged the control board. What do I do?

Note: This is not a firmware problem as the printer was getting correct temperature readings before that. Also, I have a second extruder thermistor port that is unused. If I did damage my board, could I edit pins.h and configuration.h to use this port instead, and completely disconnect the heated printbed?


After replacing the control board, it now prints flawlessly. Apparently,I really did damage the control board...

  • $\begingroup$ Were you able to determine what failed on the controller board? $\endgroup$ Jun 25 '17 at 0:32

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