Nozzle Heating Test Failure After Firmware Update to 6.1.2
I haven't used this printer for a while, maybe 6 months and I took the first step of updating the firmware to 5.1.2 to 6.1.2 -
After booting, the firmware seemed to have installed successfully but there was an error message prompting me to run calibration/tests before printing.
I did this, and the nozzle heating test seemed to fail - no error message but just a red X next to this part of the test. I was surprised as this had never happened before, and there were no further error messages or crash logs.
During inspection, the printer, nozzle and wires all look fine and undamaged - and the nozzle easily heats up to 200 degrees during manual temperature operation. 
I ran the test again, and it seems like the nozzle heating test consistently fails when it reaches around 130-135 degrees, and immediately starts cooling down.
I would be grateful for any advice please as I would really like to fix this issue ASAP - my initial thoughts were a faulty firmware install, but I couldn't find any way to re-install the same firmware version to verify this.
RE: Nozzle Heating Test Failure After Firmware Update to 6.1.2
Please provide more details about the printer, because it looks like a custom setup.
Is that a Revo for Mini? Do you use custom heater with higher wattage?
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Nozzle Heating Test Failure After Firmware Update to 6.1.2
Getting the exact same thing on my Mini.
RE: Nozzle Heating Test Failure After Firmware Update to 6.1.2
Okay so I managed to get this "fixed" by restoring printer to factory reset and reflashing FW. not sure, but something must have gone wrong when it was flashed the first time. Mine was on an older version, as updating FW isn't something I do often.