Update the ADEV firmware and initialize the ADEV.
When you initialize the ADEV, the installed applications and settings are reset.
Before you initialize the ADEV, complete the procedures in 5.1 Charging the ADEV to make sure that the device is sufficiently charged.
For more information about initializing the ADEV, see Nintendo Switch ADEV Quick Start > Initializing the ADEV.
To avoid malfunction, do not turn off the power to the ADEV or remove game cards or microSD cards while the ADEV is initializing. If the ADEV malfunctions, it cannot be restored and it must be repaired at Nintendo.
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