![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
You can try to unplug the hot end line from the motherboard.
If the hot-end temperature is displayed as -14, the motherboard should have no problem.
Try to measure the thermistor at the hot end.
If the remaining temperature is displayed, there may be a problem with the motherboard.
I hope this can help you.