Gardena smart SILENO sense 400: No loop signal

What this fault means

The mower cannot detect a valid boundary loop.

Safety: Stop the mower and follow the manufacturer safety instructions before physical inspection.

Step-by-step checks

1. Read the charging-station LED first.
2. If the LED flashes blue, inspect the boundary connection, wire damage and the guide-to-boundary connector.
3. If the LED is off, diagnose station power before digging up wire.
4. If the LED flashes green or otherwise indicates a different mode, follow the exact SILENO model support path rather than assuming a break.
5. Use a temporary short test loop to separate installation faults from mower/station electronics when appropriate.

Evidence source: Manufacturer/support reference

Evidence checked 2026-08-25. Diagnostic procedures are labelled separately from manufacturer-exact error instructions.

Did one of these checks actually fix the mower?

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