Robot mower shows E10 and will not charge when docked; charging LED on base may be off or flashing.

Safety first: Unplug the charging station from mains before cleaning contacts or opening the base. Turn OFF the mower before cleaning its contacts.

• Clean charging contacts: Use a dry cloth or fine abrasive pad to clean the metal contacts on both the mower and the charging station. Remove oxidation and grass sap.
• Check docking alignment: Ensure the charging base is level and firmly fixed. Guide the mower manually into the dock and confirm that both contacts touch firmly.
• Inspect power supply: Verify the LawnMaster power adapter is plugged in and the outlet has power. Check the adapter cable for cuts or kinks.
• Check base LEDs: Refer to the manual for LED codes. A dead LED may indicate a failed power supply or base PCB.
• Inspect base wiring: If comfortable, open the base and check for burnt components, loose connectors, or water damage on the charging station PCB.

If cleaning and alignment do not clear E10, test with a known-good LawnMaster power supply if available. Otherwise, the charging station assembly or its PCB likely needs replacement.