Screen briefly comes on then shuts off
Check battery charge and connection. Inspect for controller cabling issues. Try with different battery if possible.
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Confirm battery is charged & connected. Inspect all wiring. Try display hard reset (power/off/on, reconnect cables).The screen turns off and the power cuts for my ebike?
There are two main reasons for this happening. Low Charge Charge the battery and try operating the ebike once again. LCD Display connector is loose Reconnect and check all other connections inside the controller housing