I can't hear sound with a monitor earphone.
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Check the monitor earphone.
Make sure the monitor earphone cable is fully inserted into the socket on the monitor earphone adaptor. -
Replace the monitor earphone.
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Check the adaptor is connected.
Check that the monitor earphone adaptor is properly connected to the processor and to the battery module. -
Are you using the Nucleus Smart App?
If you use the Nucleus Smart App, use the Status screen to check the processor volume level.