The contents of the SD card are not being displayed
Extract the SD card from the printer and then re-insert. If the problem persists,
try switching the machine off and on again. Use another device, such as a
computer, to check that it is detected and read correctly.
A temperature reading error appears on the LCD
This message appears when the thermistor cable is disconnected or broken, or
another cable is damaged, or alternatively, when the electronics fail to read the
temperature correctly.