Diagnosing a malfunctioning hearing aid?

Hello,
I have a malfunctioning HA.
One vendor said they looked at it with a stethoscope and could not find anything wrong with it.
Despite me knowing it had twice stopped working and its tone/amplification were not right.
Recalling the original HA vendor had the HA connected to various devices, I’m thinking a stethoscope might be an incomplete or low-end testing devices.
What are the various ways, remote or onsite, an audiologist or HIS should properly evaluate why an HA is malfunctioning??
Thank you, Tom

They shouldn’t second guess what’s wrong, they (and you can as well) check the obvious things like blocked wax filter on the receiver, broken wire, split BTE tube, blocked microphone covers etc, but for proper verification needs to done by the manufacturer.

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Test boxes exist for this reason.

WH

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Tom did you take the malfunctioning hearing aids to the vender who you originally purchased them?

What vendor I take it to is not my question.
My question is – HOW do vendors et al. diagnose malfunctioning HAs when the device itself is physically intact (see tenkan’s reply)??

@WhiteHat mentioned what else they could do, in my own experience they don’t bother they simply return to the manufacturer to sort out, they have better things to do with their time, like selling more HAs to the gul…I mean who need them.

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