Samsung User Interface / Start Circuit Failure

Robot vacuum does not start when the Start/Clean button is pressed, but the battery appears charged.

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.

Possible Causes

Faulty start button or touch panel, Child lock or pause mode enabled, Firmware freeze, Main PCB input failure

Safety first: Standard precautions only.

Check app control: Try starting a cleaning cycle from the Samsung app. If it starts, the physical button may be faulty.
Disable child lock: Some models have a child lock or key lock; refer to the manual and disable it if active.
Power cycle: Turn the main power switch OFF (if present) for 30 seconds, then ON, or hold the power button for 10–15 seconds to reboot.
If still unresponsive: The touch panel or main PCB may be defective and require replacement.

Medium 3/5

Touch Control PCB

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