I recently swapped my printer from a smart lcd to a graphical lcd and am getting a err:mintemp on boot. It only happens when I'm on the power supply alone . If I plug in the USB after I turn it on, the thermistors both show to the correct temp and the printer will work. If I reset the board after plugging in both USB and power supply the error is cleared.
Wondering what the problem is as I'd like to be able to print off SD only. The thermistor outputs are always getting 5v regardless.
Edited 1 time(s). Last edit at 07/05/2016 05:22PM by Brikloss.