Have you tried the following steps?
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Update the firmware of Noahlink Wireless. If its firmware is already the latest version, please reinstall the firmware several times.
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Replace the USB cable of Noahlink Wireless.
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Create 2 new client profiles in Widex Compass GPS, and connect each profile to one of the hearing aids respectively.
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Replace the receiver of the hearing aid that you cannot connect to. Note that the receiver of some hearing aids also functions as its antenna.