E14
Einhell
Mainboard Power Supply Fault
Robot lawnmower shows E14 and does not start; display may be blank or flicker.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Defective DC‑DC converter on mainboard, Loose battery terminals, Short circuit on mainboard, Damaged internal fuse or protection component
How to Fix / Troubleshooting
Safety first: Turn OFF the mower, remove the battery pack if possible, and unplug the charging station. Avoid touching exposed circuitry while powered.
- Check battery terminals: Ensure the battery connectors are tight and free from corrosion. Clean with a dry cloth and re‑seat.
- Inspect for burnt components: Open the electronics compartment and visually inspect the mainboard for burnt areas, swollen components, or a burnt smell.
- Check internal fuse: Some Einhell boards include a small replaceable fuse. Test continuity with a multimeter and replace with the exact same rating if blown.
- Eliminate shorts: Look for loose screws or metal objects that could be shorting the board. Remove any foreign objects.
- Professional repair: If E14 remains and you see no simple issue, the mainboard power section is likely defective. Replacement of the mainboard is usually required and should be done by a qualified technician.
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Repair Difficulty
Professional Required
5/5
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