This prompt indicates that there is a problem with the connection between the printer motherboard and other components, possibly due to poor wiring or damage to the motherboard.
Check the wiring: Ensure that all the connection cables of the motherboard are firm and not loose, especially the power and data cables.
Replace the motherboard: If the wiring is normal, but the problem remains, the motherboard itself may be damaged, consider replacing the motherboard.
Check all cables to the motherboard and ensure that they are securely connected.
Ensure that the cable is not damaged or worn.
If the problem persists, replace the motherboard.