This error meaage occurs when the printer returns to home or a model is printed.
Check the motherboard cooling fan cable and motherboard indicator light in turn.
A 2.0 mm Allen key
Power on the printer. Return the printer homing position. Check if the motherboard indicator light.
Warning: Do not touch any electronic components after powering on the printer to avoid electric shock.
If the motherboard cooling fan can't rotate normally during the homing process and the indicator light on the motherboard does not turn on, replace the motherboard with a new one.
If the motherboard indicator light turns on, check whether the motherboard cooling fan can rotate normally.
If the motherboard cooling fan is running slowly or intermittently, replace it with a new motherboard cooling fan.